20 THE CANADIAN ENTOMOLOGIST. 



Oncideres cornuticeps, n. sp. — Short, robust, nearly of the same form 

 2iS> pusfu/atus : colour very light brown, pubescence fine, not coarse, per- 

 mitting the shining surface of elytra to be seen, brownish-cinereous inter- 

 mixed with denser ochreous pubescence above, forming numerous small 

 spots on elytra and two on disk of thorax; the latter are situated on each 

 side of the median glabrous space. Antennal tubercles prolonged at apex 

 into distinct porrect spines. Thorax broader than long, as broad behind 

 as before the distinct lateral spine ; disk slightly uneven, with a few 

 punctures at base and on side tubercles, at middle a small glabrous space, 

 which is obsolete towards apex. Elytra slightly narrowing to apex from 

 the shining humeral tubercle, which is situated at side, a little below the 

 base ; i)unctuation sparse and nearly uniform throughout, the punctures 

 only slightly smaller towards apex, and are not glabrous, but covered by 

 the pubescence, at base are about 4 or 6 small shining granules on each 

 elytron. Abdomen shining, more densely clothed with longer hairs than 

 the upper surface, each segment with two denuded round spots on each 

 side. Length, including the frontal horns, 20 mm. One male labelled 

 Texas in collection Dietz, 



Lypsimena tigrina^ Skinner, Ent. News, XVI, p. 291. — The descrip- 

 tion of this beetle is unsatisfactorily short and insufficient, and does not 

 give any idea of the general form and other important characters, 

 especially troublesome if the species is placed in a wrong genus, which I 

 believe is the case here. 



In Lepidoptera, where the species differ very little in shape, etc., 

 colour and markings are considered important in separating species, but 

 in Coleoptera, where, with very {qw exceptions, the species in a genus differ 

 from each other either in general form, form of thorax and elytra^ 

 structure or sculpture of the under side, head, antennae, legs, or some other 

 character, colour and markings are considered secondary. 



I cannot find among my Arizona material a Lypsimejia^ but have 

 taken a few specimens of an Estola, which I think is the same as the 

 Doctor's L tigrina. It is a longer and less robust insect that the Lower 

 Californian sordida, but agrees with it in all generic characters, except that 

 the lower lobe of the eyes is longer, which we find in some Mexican 

 species also. The armed thorax removes it from Lypsimena at once, 

 besides other characters. 



The linear black dashes on the elytra are subject to variation, they 

 have a tendency to become longitudinally confluent, and the fi)ur post- 



