8456 



Entomological Society. 



insect the lateral portions are curved downwards. The apex of this segment is tinted 

 with piceous in both sexes, but I have seen no specimens in which the entire segment 

 is testaceous, as is generally the case in H. analis. The antennae are dusky, often to 

 the base, but sometimes the two basal joints show a dusky testaceous tiut in parts, 

 especially on the under side and at the base." 



With respect to this communication, Mr. Waterhouse made the following 

 remarks : — 



" The Homalota soror of Kraatz (Nat. der Ins. Deutschl. p.257), we are informed, 

 is very closely allied to H. analis, but is distinguished by the antennae being darker 

 and a little more incrassated towards the apex; by the palpi being pitchy brown; the 

 thorax and elytra blackish ; the abdomen almost as thickly, but much more finely punc- 

 tured, and uniformly black. The male has, in the upper plate of the penultimate abdomi- 

 nal segment, a still larger triangular notch,* the margins of the plate on either side of 

 the notch falling off more obliquely. In the iusect exhibited I do not perceive the 

 differences in the punctuation alluded to, nor those in the structure of the antennae. 



" Again, a species of Homalota is distinguished from H. analis by Thomson (see 

 his ' Skandinaviens Coleoptera,' ii. 294), under the name Amischa platycephala, by 

 having the abdominal plate in the male deeply emarginate, and in the female trun- 

 cate, so far agreeing with our insect. But A. platycephala is said to be broader than 

 H. analis, less convex, and with the fovea on the thorax obsolete ; the antenna? testa- 

 ceous at the base, and the elytra obscure testaceous, — distinctions which do not exist 

 in the insect before the Society. I still think it possible that it may be identical both 

 with H. soror and A. platycephala. Thomson says of his species that it is scarce in 

 North Scania, and Kraatz simply informs us that the H. soror was taken by him near 

 Bonn, and he makes no mention of the female. It is probable then that neither of 

 these authors had ample material for arriving at the characters of the species, and 

 that, under more favourable circumstances, their descriptions might have been modi- 

 fied. However this may be, this note is communicated to the Society with the view 

 of eliciting further information respecting those species which are certainly most 

 closely allied to H. analis. The last-mentioned species I have collected in great 

 numbers in various localities, but, amongst eighty specimens roughly grouped together 

 in my unexamined collection of species of Homalota, I do not appear to possess a 

 single specimen corresponding with the insect from the Hammersmith Marshes, of 

 which my son found and exhibits two dozen specimens, presenting an equal number 

 of males and females. The species then would appear to be very local." 



Paper read. 



Mr. M'Lachlan read a paper on Anisocentropus, a new genus of exotic Tri- 

 choptera ; descriptions were given of five species of that genus, viz., A. illustris, n. sp. 

 (of which specimens were exhibited), A. dilucidus, n. sp., A. immunis, n. sp., A. lati- 

 fascia, Walk., and A. pyraloides, Walk. To these was added the description of a new 

 species of Dipseudopsis, D. collaris, from China.—/. W. D. 



* "Noch weiter dreieckig ausgeschnitten." I am not sure that I have rendered 

 this sentence accurately. Both H. analis and H. soror, according to Dr. Kraatz, have 

 a triangular notch or emargination to the abdominal segment in the male, and, as I 

 understand the matter, the segment is still more notched in the latter species than in 

 the former; the term "weiter" cannot be translated simply as "deeper," nor as 

 " wider," but its sense would be conveyed by the two latter terms combined. 



