248 [November, 



— Wings clear. ^ antennse not very tliick nor much compressed, or else only red 



beneatli. ? hind femora and tarsi generally with a good deal of white, but 

 in this respect they vary 5. 



5. (? antennae red, not very thick nor much compressed. ? hind femora generally 



with the apical half black, hind tibiae blackish at apex ruficornis, 01. 



— c? antennae only red beneath, thick and compressed. 9 hind femora generally 



with at least the apical half white, sometimes without black markings at all, 



hind tibiae generally scarcely black at all at apex pallipes, Lep. 



(appendiculatus, C). 



6. Abdomen above black except the apical segment, which, together with most of the 



ventral surface is ochreous (green in life). Mouth, clypeus, pronotum, tegulae 

 and legs (including the whole of the hind femora) pale viridana, Knw. 



— Abdomen, above and below, largely or entirely bright red or orange ; if marked 



above with black, the black is moi'e or less interrupted and may be reduced 

 to spots or sti'eaks. Hind femora sometimes black at ayjex 7. 



7. Hind femora black at apex 8. 



— Hind femora entirely pale at apex 9. 



8. Abdomen above red in centre with the base and apex black quercus, Htg. 



— Abdomen above very variable in colour, the middle segments may be red, or 



more or less streaked basally with black, but the apex is always red... 



paUidivenfris, Fall. 



9. Mesopleurae black, abdomen testaceous (rather large bright-looking species. 



Length may reach 7i mm.) betnlx, Retz. 



— Mesopleurae pale 10. 



10. Smaller (6 mm. long or less). Abdomen testaceous above, black only at base, 



short. Claws with subapical tooth unusually large, looking almost bifid 

 (whence the name of the species). ? saw-sheath comparatively narrow. 

 Costa and stigma'dark brown auhhifida, Thorns. 



— Larger (inay reach 8 mm. long). Abdomen more or less distinctly streaked 



or at least spotted with black after the base, elongate. 9 saw-sheath 

 thick. Costa and stigma yellowish, the latter with an infuscated base... 



conjugata, Dhb. 



Notes on some of the above Species. 

 Crassicornis, ruficornis, pallipes.— Them three species are ex- 

 ceedingly close allies ; and though I have done my best to distinguish 

 them by definite characters, I can find none which are absolutely 

 reliable, except those of the antennse in the ^ (^ , and even these are 

 often hard to be sure about in particular specimens. The coloration 

 of the $ hind femora varies in all the species, but on the whole there 

 is certainly most black in normal crassicornis, less in ruficornis, and 

 least in pallipes. An example with perfectly black hind femora may 

 be referred pretty certainly to crassicornis, and one in which they 

 show no black at all to pallipes. 



