178 Dr. Sharp's Bevislon of the 



Mas; capite impresso, abdomine segmento 7° ven- 

 trali elong-ato. 



Very like E. analis, and equal in size to the small in- 

 dividuals of it, but of more parallel and flatter form, 

 more unicolorous, and even more finely and densely 

 punctured, so as to be less shining; the thorax is 

 flatter and more transverse, and less distinctly foveolate 

 at the base. 



The male is readily distinguished from the female; 

 it has the upper surface of the head deeply impressed, 

 and its abdomen has the seventh ventral segment dis- 

 tinctly produced, and the apex furnished in the middle 

 with five or six distinct black hairs. 



Also closely allied to H. cavifrons, and possessing 

 similar sexual characters, but more unicolorous, more 

 parallel in form, more densely and finely punctured, 

 with flatter and more transverse thorax, and with the 

 elytra longer than the thorax, and not narrowed at the 

 shoulders. 



I have found this species only on the banks of the 

 Nith, and its tributary Cairn Water, under stones, in 

 company with Scopcens Erichsoni. 



72. HomaJota soror. 



Nigra, antennis fuscis, pedibus fusco-testaceis ; capite 

 subtriangulari ; thorace basi foveolato; abdomine supra 

 undique dense subtiliter punctate. Long. 1 lin. 



Mas; abdomine segmento 7° dorsali apice medio pro- 

 funde exciso, ventrali elongate. 



H. soror, Kr. Ins. Deutsch. ii. 257; Wat. Cat. 



Extremely like the large dark form of H. analis, and 

 distinguished from such only by its more densely and 

 distinctly punctured abdomen (especially notable towards 

 the apex), and its difl'erent sexual characters; the male 

 has the head more or less distinctly channelled; the 

 seventh segment of the abdomen has a much deeper and 

 more distinct notch than has H. analis; this notch, too, 

 is of a difierent shape, and commences on each side much 

 nearer the outside angle of the plate ; the ventral plate 

 of the same segment is distinctly produced, and its hind 



