127 



CE. tril*a«^cinfa, Walk., Cat. Dermap. Salt., IV, 729. 



Syu., Gn/lhis Mfasciatus, Say, Ent., ed. Lee, I, 78, PI. 34. 



OSdijyofla pruinosa, Thos., Proc. Acad. Nat. Sci. Phila., 1870, p. 80. 



Vertex broad ; toveola shallow, scarcely longer than wide, the margins 

 continuous with those of the frontal costa ; frontal costa narrow, deeply sul- 

 cate, contracting immediately below the ocellus, suddenly obliterated before 

 reaching the clypeus ; lateral carinas not prominent. Anterior lobes of the 

 prouotum compressed; disk of the posterior lobe flat; the median carina 

 reduced to an almost imperceptible line; anterior margin obtusely rounded; 

 posterior margin about right-angled, minutely punctured. Elytra and wings 

 pass the abdomen about one-fourtli their length. Antennae, especially of the 

 male, large and long, equal to or longer than half the body. 



Color. — Lower portions of the head and thorax dull greenish-yellow ; 

 occiput and disk of the pronotum an ashy or olive-brown, sometimes slightly 

 pruinose. Elytra dull-yellowish, with three broad, transverse, dark-brown 

 bands, the middle one the broadest; sometimes the outer band is some- 

 what irregular. Wings slightly papilioform ; basal portion greenish-yellow, 

 with a tolerably broad, black band, narrowed and marginal behind, continued 

 to the anal angle ; usual width, one-fifth to one-fourth the extent of the wing; 

 apex transparent-yellow. Posterior femora dull-yellow, with an oblique, brown 

 band on the outside, and basal half of the inside black; posterior tibiae bright- 

 fulvous. 



Dimensions. — 5 Length, 1.4 inches ; elytra, 1.4 inches ; posterior femora, 

 6 inch; posterior tibise, 0.58 inch. ^ Length, 1.10 to 1.2 inches. 



Arkansas (Say); Northern New Mexico, Colorado, Wyoming, Utah, 

 Dakota (Thomas); Nebraska, Kansas (Dodge). 



«E. hofTmaiiii, Thos., in Expl. Nev. and Ariz., Wheeler, 1871, MSS. 



Very closely allied to OE. trifasciata, and possibly it may be but a 

 variety ; but there are some variations which appear to mark it as distinct. 

 The only specimen is so badly damaged that it is impossible to do more than 

 indicate its chief characters. Sex unknown, as the apex of the abdomen has 

 been broken off; the antennae and legs also wanting. The occiput ascend- 

 ing ; the top of the head somewhat elevated ; eyes ovate, large, prominent ; 

 vertex slightly elongate and expanding slightly in front of the eyes; margins 

 raised; a dim median carina; frontal costa sulcate, very slightly contracted 



