TRIASSIC INSECTS OF COLORADO. 471 



tenninating in the distal half of the wing after an abrupt bend, an uhiar vein with only 

 a very few branches not connected by cross veins, and one or two simple or simply forked 

 veins in the anal area of the wing. 



Cercopyllis justiciae sp. nov. 

 PI. 42, fig. 6. 



A small stout-bodied insect with a tapering abdomen, divided nniformly into joints 

 and with a somewhat pointed tip. The fore-wing extends a long way beyond the tip of 

 the abdomen, which indeed only reaches its middle, is moderately broad with a strongly 

 and regularly convex costa; the apex is lost, but the curve gives a certain definiteness to 

 the probable length of the wing, so that the radial vein may be said to tei'minate at the 

 end of its middle third; this vein runs completely parallel to and at a moderate distance 

 from the margin until close to its termination, when it liends abruptly as if to form an 

 ovate stigma and passes obliquely to the margin. The ulnar vein forks thrice subequi- 

 distantly, the last time opposite the bend of the radial vein, to the oblique end of which 

 its final branch is parallel ; the first fork is a little nearer to the base of the wing than 

 to the last fork, and the vein is rather distant from the radial vein ; all the branches are 

 simple, distant, nearly straight, and nnconnected by cross veins. Within these are two 

 other simple veins, parallel to the inner ulnar branch, the one next it perhaps the sutura 

 clavi. 



Length of (headless) body, 4.4 mm. ; breadth of thorax, 2.2 mm. ; length of fragment 

 of wing, 5 mm.; probaljle complete length, 5.4 nma.; probable breadth, 2.1 nun. 



A single specimen and its reverse, Is^o. 39. 



Cercopyllis delicatula sp. nov. 

 PI. 42, fig. 11. 



A nearly complete fore-wing unfortunately with the base very obscure. It is about two 

 and a half times longer than broad, broadest in the apical half toward which it increases 

 very slowly in size, tapering more rapidly, the apex well rounded, the upper and lower 

 halves nearly symmetrical, the costal margin nearly straight to the end of the radial vein. 

 The radial vein is very similar to that of the preceding species, but if anything is a lit- 

 tle longer. The ulnar vein has the same number of l)i-anches, but arising at veiy unequal 

 distances and so of very unequal lengths, the first and second near together, well within 

 the basal half of the wing, the outer quite as in the preceding species, though a little 

 farther removed from the oblique portion of the radial vein. The vein next within the 

 inner ulnar vein (the sutura clavi?) is straight and not, as shown on the plate, arcuate, 

 and the one within that shows some signs of simple inferior branches. Veins and mem- 

 brane alike are seen under a half-inch objective to be uniformly clothed with excessively 

 fine hairs, as far apart as their OAvn length (which does not exceed 0.017 mm.), directed 

 outward, with a tendency to run in lines. 



Length of wing, 5.2 mm.; breadth, 2 mm. 



One specimen and its reverse, N!o. 40. 



