Vol 102, No 1 (2023)

In uence of constant temperatures (15, 20, 25 and 30 °C) and thermoperiods (daily alternation of high (25 or 30 °C) and low (15 or 20 °C) temperature periods) on the maternal induction of progeny diapause was studied in females of the egg parasitoid Trichogramma telengai Sor. (Hymenoptera, Trichogrammatidae) under laboratory conditions. Two variants of each thermoperiod were tested: “short-day” (both thermophase and cryophase durations were 12 h) and “long-day” (thermophase and cryophase durations were 18 and 6 h, correspondingly). In addition, constant temperatures equal to the means of all thermoperiods were tested. The experiments showed that thermoperiods as well as constant temperatures have a substantial impact on the maternal photoperiodic response both in the interaction with various photoperiods and under constant darkness. However, T. telengai are evidently not able to perceive thermoperiods as a source of information on day length (and thereby on time of year).

Nymphal and adult Urostylis annulicornis Scott, 1874 were reared in cages from eggs overwintered under oak bark in the south of Primorskii Territory. Instars I hatch before the onset of vegetation season and develop under bark where they feed by sucking the jelly-like coating of the egg mass. As oak leaves unfold, instars I leave the shelter and begin feeding on leaf sap. Adults live in the oak crown. The sequence of molts of all nymphal stages, their feeding, and timing of seasonal development of the species in nature are described.

As a result of long-term studies, the complex e ect of the depth of soil freezing, depth of snow cover, the amount of precipitation, the temperature of air and of soil at a depth of 0-20 and 20-40 cm, the sum of e ective temperatures on the start date of the adult Leptinotarsa decemlineata (Say) emergence from the soil in potato plantings was established in the Central Forest-Steppe Priobskii Agro-Landscape Region. The average values of these environmental factors for the period from September of the previous year to June of the current year by 27.2% determined the emergence date of the overwintered imago. The share of the conditions of the previous year in uence was 50.5, and the conditions of the current year, 31.1%. The appearance of the overwintered adults was delayed when they had gone for overwintering in moist and cool soil. In November, the emergence date begins to be a ected by the depth of snow cover and the depth of soil freezing (the in uence shares 86.8 and 79.5%, respectively), and their e ect together with the factors listed accounted for 35.3%. In December, the same trend was observed, but the air temperature was not considered. In January, the importance of the parameter of the soil temperature increased to 84.3%, and that of the complex of factors in 26.7% of cases. In February, the same trend was observed, and the share of the in uence all previously listed factors increased to 43.0%. From March, the impact of the depth of soil freezing and the depth of snow has decreased to 42.3%, and from April, the sum of rain precipitation and air temperature began to in uence in 81.8 and 65.8% of cases, respectively. In May, the start date of the pest appearance is a ected only by the soil temperature at a depth of 0-20 and 20-40 cm - 80.7 and 94.0%, respectively, and by photoperiod - 91.1%. In June, the main factors were the amount of rain precipitation and the soil temperature - 100%, while the impact of accumulated SET was 50.0%. Thus, in this region, on average, the beginning of the adults’ Exit from the soil starts on June 17 ± 12 days, when the average daily air temperature reaches +19.1 ± 5.8 °C, the sum of rain precipitation (at air temperature > 10 °C) - 70.7 ± 39.1 mm, and the soil at a depth of 0-20 and 20-40 cm warms up to +17.6 ± 3.8 °C and +14.8 ± 2.5 °C, respectively. The SET in this period is 149.0 ± 64.1 degree days.

A comparative morphological study of the structure and distribution of sensilla on the maxillary and labial palps in representatives of the family Hydropsychidae was performed. Morphology of palpal sensilla was studied in 17 species from 12 genera by scanning electron microscopy. Four types of sensilla were found on the palps of the studied species: long trichoid sensilla, chaetoid sensilla, campaniform sensilla, and petaloid sensilla; basiconic and pseudoplacoid sensilla were not found on palps. All studied species lack apical sensory complexes at the tips of both pairs of palps, where only long chaetoid sensilla are present. Petaloid sensilla form sensory elds on the 4^th (in Arctopsychinae) or on the 3^rd and 4^th segments (in Diplectroninae, Hydropsychinae, Macronematinae) of the maxillary palps. These sensilla are never present on the labial palps. Sensory elds include from 5-10 sensilla in Hydropsychinae to 40 in Arctopsychinae.

Thirteen species of leaf beetles of the genus Colaspoides Laporte are described as new to science: Colaspoides cameronensis sp. n., C. asarovi sp. n., C. nikandrovitshi sp. n., C. pahangensis sp. n. from the Malay Peninsula, and Colaspoides aeneoviridis sp. n., C. borneomontana sp. n., C. bruniensis sp. n., C. metallactus sp. n., C. costipennis sp. n., C. gunungensis sp. n., C. latipalpis sp. n., C. paraviolacea sp. n., and C. vityukovae sp. n. from the island of Borneo. New identi cation tables for the following species complexes are proposed: C. cognata Baly, 1867; C. cognatella L. Medvedev, 2004; C. borneomontana sp. n. and C. viridimarginata Baly, 1867.

XVI съезд Русского энтомологического общества с сателлитным мероприятием - XII Чтениями памяти О. А. Катаева - проходил в Москве с 22 по 26 августа 2022 г. на базе Московского государственного университета им. М. В. Ломоносова. Информационное сопровождение съезда было организовано на сайтах кафедры энтомологии биологического факультета МГУ (http://entomology.bio.msu.ru/res-2022/), Зоологического института РАН (www.zin.ru/conferences/cres16) и специально созданной странице в соцсети Вконтакте (vk.com/reo2022) при поддержке основного сайта РЭО (https://www.zin.ru/societies/res/) и страницы РЭО в соцсети Вконтакте (https://vk.com/club_reo). Регистрация участников проводилась на базе веб-платформы МГУ «Ломоносов» (https://lomonosov-msu.ru/). Информация о съезде размещалась на сайтах и распространялась по электронной почте. Для участия в XVI съезде предварительно зарегистрировалось 656 специалистов как из разных городов России (Барнаул, Благовещенск, Владивосток, Воронеж, Екатеринбург, Казань, Краснодар, Москва, Новосибирск, Петрозаводск, Ростов-на-Дону, Самара, С.-Петербург, Саратов, Сыктывкар, Томск, Тюмень, Уфа, Якутск и др.), так и из шестнадцати других государств: Армении, Белоруссии, Болгарии, Великобритании, Германии, ДНР, Кипра, Молдовы, Монголии, Пакистана, Турции, Франции, Чехии, Швейцарии, Южной Кореи и Японии. В заявках представлено более 250 университетов, исследовательских институтов, а также заповедников, национальных парков, музеев и других организаций (в том числе школ). Заявки на выступления подали 643 человека (включая соавторов). До открытия съезда был опубликован сборник, включающий тезисы 397 докладов. Кроме того, сборник в формате pdf был подготовлен и размещен в открытом доступе. В работе съезда участвовали 282 исследователя, среди них были энтомологи из четырех зарубежных стран: Белоруссии, Дании, США и Украины. Было представлено 224 доклада, из них 4 общих пленарных, 19 секционных пленарных и 201 секционный. Кроме того, было представлено 49 постеров.