New records of polycentropodid caddisflies from Korea (Insecta: Trichoptera)

Four species of the family Polycentropodidae –Plectrocnemia baculifera, P. kusnezovi, Paranyctiophylax hjangsanchonus and Polyplectropus nocturnus– are recorded from Korea. Polyplectropus nocturnus is newly recorded from the Korean peninsula. The other three species are recorded from the Republic of Korea for the first time.     

Upregulation of hemolymph and tissue ferritin by dietary HgCl2 in the wax moth Galleria mellonella

The effect of Hg treatment on hemolymph and tissue ferritin in the wax moth Galleria mellonella was examined by western blotting. At 48 h after feeding HgCl₂, the level of hemolymph ferritin increased approximately 1.8‐fold over that of control insects that were not fed HgCl₂, while there was a small increase in tissue ferritin. Time series experiments showed that tissue ferritin had a typically saturated pattern, with a maximum level from 24 to 72 h, although it decreased 12 h following HgCl₂ feeding, while hemolymph ferritin first decreased but subsequently increased. Tissue ferritin in the fat body, gut and Malpighian tubules, the main tissues of ferritin expression, was upregulated over time following treatment with Hg, and in particular, tissue ferritin in the gut increased by a large amount at 12–48 h. The results suggest that in G. mellonella, the ferritin‐inducible mechanisms following treatment with HgCl₂ are different for hemolymph and tissue ferritin, as are their biochemical properties.     

防止逃鱼用的拦网和拦栅的合理规格的研究

目前一般较大的湖泊水库放养鱼类的回捕率颇低,逃鱼是重要原因之一。为了确定拦鱼用的网和栅所应采取的规格,测量了2,227尾(3—16厘米)鲢、鳙、草、青鱼种的全长,最大周长、头宽、颅宽的各个数值,推算出全长与最大周长、头宽、颅宽的迥归方程式及它们的95%的可信限。通过实验,观察到在流水条件下,鱼种能溯水穿越较自身最大周长为小的拦网网目或较头宽为小的拦栅栅距而逃逸。作者称这种能力为“穿拦系数”(用Kg 或Kp 表示)。并测出在武昌东湖某些生活污水进水口处,1973年3—4月份白鲢鱼种的穿拦系数按Kg 计算为1.5,按Kp 计算为1.2。作者建议在静水或出水口处,设置拦鱼用的拦网的网目长度不得超过所投放色种的最大周长的95%的可信限的下限的1/2,各种拦栅的栅距不得超过鱼种的头宽的95%可信限的下限。而在流水条件下,在确定所应采取的拦网网目或拦栅栅距时,还应该考虑“穿拦系数”在内。文末附有检索表,列举了鲢、鳙、草、青鱼种(3—16厘米)相应于全长值的最大周长值、头宽值、颅宽值以及它们的95%可信限的上限和下限的各个数值,供确定拦网网目和拦栅栅距的规格时参考。     

中国毛翅目的新种

作者最近在鉴定毛翅目昆虫的工作中描述了1个新亚属和34个新种,分属于22个属,其中Psilochorema,Wormaldia,Kibuneopsychomyia,Goerinella,Dinarthrodes,Eothremma和 Notidobia 几属在我国是初次记载。 下列各位同志曾给予作者很多帮助,或借用标本,或寄赠标本,谨趁此机会表示衷     

几种天社蛾科幼虫外形的比较

(1)本文比较了六种天社蛾幼虫(隶属于五个不同的属)的外部形态,它们在构造上具有下列的共同特点:(甲)唇基膜具有一定的叶状构造。(乙)上颚尖端的外缘呈弧形,无齿。(丙)六种幼虫中有五种具有前胸翻缩腺。 (2)天社蛾幼虫头部的毛具有下列几个类型:(甲)仅具原生毛。(乙)虽具有次生毛,但由于原生毛较粗是尚易于识别。(丙)由于次生毛过分密集;致原生毛无从区分。 (3)天社蛾幼虫的上唇和上颚的构造可供分类学上的应用。 (4)天社蛾幼虫体毛的分布,可分下列几个类型:(甲)除腹足外身体的其他区域仅具原生毛。(乙)身体各部均有次生毛。(丙)兼具有次生毛和毛疣。由于次生毛常有区域性的集中现象,可以按照毛群加以命名。 (5)按照幼虫的构造,尤其是体毛的分布情况,天社蛾科和夜蛾科、灯蛾科具有较近的系统关系。