NEW BRITISH SPECIES, ETC., IN 1863. 45 



It differs from analis in the uniformly dark (nearly black) 

 colour of the body and antennae, and in the sexual differences 

 afforded by the emargination of the upper surface of the 

 penultimate segment of the abdomen in the male, which in 

 analis exhibits, in the centre of its hinder margin, a large 

 notch in the form of an obtuse-angled triangle, varying 

 slightly in depth, but always of the same outline, with no 

 impressed line following within the margin and round the 

 edges of the notch ; the upper part of the segment is also 

 slightly arched only, in a transverse direction. 



In Mr. C. Waterhouse's insect the notch has its depth 

 slightly exceeding its width, its sides nearly parallel, and its 

 termination nearly semicircular, giving the outline of a 

 bluntly terminated cone ; the edges have, moreover, a 

 delicately impressed line immediately within the margin, and 

 the upper part of the segment has its lateral portions curved 

 dowmwards. The apex of this segment is tinted with piceous 

 colour, the entire segment never being testaceous, as in analis. 



The antennae are dusky, often to the base, though the two 

 basal joints are sometimes dusky-testaceous, wdiilst in analis 

 they are clear testaceous, which colour extends in part also 

 to the third joint. 



Mr. G. R. Waterhouse considers it not unlikely that this 

 species may be referred to JI. soror, Ktz., w^itli which 

 Thomson's platycephala may possibly be synonymous. 



It must at all events be placed next after H. analis. 



16. HoMALOTA viLis, Erichs. Col. March, i. 325, 18 j Gen. 



et Spec. Staph. 97, 32 ; Redt. Faun. Austr. 819 ; 



Ktz. Ins. Deutschl. ii. 257, 62; G. R. Waterhouse, 



Proc. Ent. Soc. 2 Feb. 18G3, Zool. 8453 (1863). 



A single specimen taken long since by Mr. Waterhouse, 



who has no note of the localitv. 



