THE CANADIAN ENTOMOLOGIST. 19 



Thorax narrower behind the lateral tubercle than before, (^ without por- 



rect horns. (Sub-genus Oncideres.) 2. 



r. Ij,u;ht brown, not very densely clothed with uniform brownish cinereous 

 hairs ; elytra ornamented with a number of small rounded ochreous 

 spots, base with from 4 to 6 small blacki.sh granulations, the elytral 



])unctures covered by the pubescence coriiuticeps. 



Black or piceous, more densely covered with white pubescence, 



especially the under side; elytra with a number of reddish yellow 

 spots, at sides about middle, a more or less distinct oblique fascia 

 of denser white hairs, the fascia without reddish-yellow sj)ots, basal 

 third of elytra with a number of black shining granules, t!ie punc- 

 tures below these glabrous, shining, not covered by 

 pubescence tesselaiiis. 



2. Large robust species, elytra with a number of round, slightly elevated, 



shining black spots, which are at base granuliform pustulatus. 



Smaller species, elytra without black denuded spots, but with a numbtr 

 of small, rounded, cinereous or yellowish spots, formed by denser 

 pubescence 3. 



3. The small pubescent spots at middle of elytra white, head, base of 



elytra and legs densely covered with ochreous pubescence ; form 

 narrower and more elongate than cingulata quercus. 



The small pubescent spots at middle of elytra yellow or ochreous, 

 pubescence of head not dense, yellowish or luteous, legs not very 

 densely pubescent with cinereous hairs and, if at all, very sparsely 

 intermixed with yellow hairs 4. 



4. Disk of thorax with 3 denuded shining spots, placed transversely, 



lateral spine small, though distinct ; elytra coarsely, densely punctate, 

 with a number of granules at base, colour black or blackish- 

 brown piitator. 



Disk of thorax without 3 denuded spots, sometimes with a small 

 glabrous median line ; elytral punctuation more sparse, without or 

 with at most very few granules at base .5. 



5. Tubercles at sides of thorax distinct, colour dark brown, median fascia 



of elytra white (in fresh specimens) Texana. 



Tubercles at sides of thorax absent or very feeble, colour reddish- 

 brown or luteous, median fascia cinereous cingulata. 



