460 GEOLOGICAL SURVEY OF THE TEEEITOEIES. 



■CE. undulata, nov. sp. 



Middle foveola of the vertex somewliat elongate, elliptical, with a 

 median carina through it, and generally a depression at the front at the 

 top of the frontal costa; lateral foveolae very shallow, small, triangu- 

 lar; the frontal costa expanding just above the ocellus and at the base, 

 sulcate in the middle portion. Pronotum contracted on the anterior 

 lobes, posterior lobe flat on the dislc, rapidly expanding and punctured ; 

 median carina a dim line, slightly raised on the front lobe ; apex right- 

 angled. Elytra and wings passing the abdomen about one-third their 

 length. Wings papilioform,* very broad, the exterior margin regularly 

 and beautifully undulated or waved 5 anterior submarginal space almost' 

 as broad as the elytra ; nervules prominent, regularly and remarkably 

 parallel. 



Color, (dried after a short immersion in alcohol.) — Ash-brown. Head 

 and thorax sometimes mottled with darker brown or fuscous. Elytra 

 marked with dusky spots presenting a basal groui), an irregular middle 

 band, those on the apical portion sporadic. Wings transparent, tinged 

 with yellow at the base, the outer halt* transparent or slightly fuligi- 

 nous; the inner margin of this portion generally forms an irregular 

 somewhat dusky stripe, parallel with the body when the vv^ing is fully 

 expanded, not bending inward at the hind margin ; sometimes the dusky 

 portion is indicated only by dark nervules and nerves, those of the 

 inner half always being yellowish-white. Posterior femora have two 

 black spots inside 5 the inferior channel black, or chiefly occupied by 

 two black spots ; posterior tibise are probably bluish when the insect is 

 living. 



Dimensions. — $ , length, 1.05 inches ; elytra, 1.12 inches ; posterior 

 femora, .54 inch; posterior tibiae, .47 inch. ^ nearly as large, with 

 similar proportions. 



I found this species in Colorado and Wyoming east of the mountains. 

 I also find it among the collection made by Mr. Dodge in Colorado; 

 but as it is not among his collections made in Nebraska or Kansas, and 

 does not appear to have been in the collection made by Professor Hay- 

 den in Nebraska, it probably belongs nearer the mountains. 



(E. Saydenii, nov. sp. 



Head and thorax somewhat wrinkled. Vertex rather narrow ; cen- 

 tral foveola somewhat elongate ; margins prominent and sharp ; open 

 in front and continuous with the sulcus of the frontal costa; median 

 carina distinct ; frontal costa sulcate throughout its length, very nar- 

 row above the ocellus ; eyes prominent, sub-globose. Antennae rather 

 longer than usual. Pronotum tricarinate ; median carina distinct but 

 not prominent ; lateral carinse distinct only on the posterior lobe ; third 

 transverse incision very distinct, nearly straight;, cuts the median carina 

 about the middle ; the anterior lobes are covered with irregLdar raised 

 lines, the jjosterior lobe with elongate tubercles ; apex blunt, terminat- 

 ing in a right angle. Elytra and wings passing the abdomen, narrow. 

 Posterior femora slender. 



Color, (dried after immersion in alcohol.) — Dull clay-color, dotted with 

 brown or fuscous. A transverse fuscous stripe in front between the 

 eyes. A small fuscous spot about the middle of each side of the pro- 

 notum. Upper and lower margins of the elytra marked with small fus- 



* This term is used to distinguish the butterfly form of the wing from those 

 with regularly convex margins ; in this form there is a slight re-entering of the mar- 

 gin a little behind the front ; this applies to the general contour and not to the smaller 

 6calloj)8. 



