British Species of Ilomalota. 177 



segment of the abdomen is indicative of the male ; this 

 notch certainly varies in size in different individuals, but 

 I am unable to satisfy myself that the difference is 

 sexual. 



H. analis is extremely abundant in all sorts of situa- 

 tions all over the country. 



70. Ilomalota cavifrons. 



Nigra, thorace elytrisque piceis, antennis ano pedi- 

 busque testaceis; capite subtriangulari ; thorace basi 

 foveolato; elytris thoracis longitudinis ; abdomine supra 

 confertim subtiliter punctate, segmento 7° apice medio 

 in utroque sexu triangulariter emarginato. Long, vix 

 1 lin. 



Mas; capite medio late impresso, abdomine segmento 

 7° ventrali elongate. 



This species so greatly resembles the small forms of 

 H. analis, that it will be sufficient to point out the cha- 

 racters distinguishing it from that species. These are 

 almost entirely sexual. The upper surface of the head 

 of the male of this species is broadly and very distinctly 

 impressed, whereas it is convex in all specimens of H. 

 analis; also in this sex of H. cavifrons, the ventral plate 

 of the seventh abdominal segment is considerably pro- 

 duced (as in H. soror) , and the hind margin is furnished 

 in the middle with a bunch of five or six distinct black 

 hairs. In the female of H. cavifrons, the notch of the 

 seventh segment is broader and deeper than in specimens 

 of H. analis of the same size ; and in both sexes the 

 elytra are shorter, being only of the length of the 

 thorax. 



I have found this species only in the hilly districts of 

 Scotland, in the neighbourhood of Edinburgh, and near 

 Thornhiil. 



71. Homalota simillima. 



Picea, antennis ano pedibusque testaceis ; capite sub- 

 triangulari; thorace basi obsolete foveolato; elytris hoc 

 paulo longioribus; abdomine supra undique confertim 

 subtiliter punctato, segmento 7° apice medio in utroque 

 sexu emarginato. Long, vix 1 lin. 



