164 



the eyes; frontal costa usually but slightly sulcale; sides parallel. Eyes 

 large and rather prominent. Elytra and wings generally a little longer than 

 the abdomen. The cerci of the male rather broad and flat ; apex of last 

 ventral segment is entire and truncate. The yellow stripes on the side extend 

 from the base of the wing to the insertion of the jjosterior femora. The 

 ground color varies with localities and age, and most of the specimens from 

 one or two sections appear to have unspotted elytra; sometimes a reddish- 

 brown tint prevails ; at others a dark-olive ; at others a dark purplish-brown ; 

 yet the markings generally remain the same. 



Localities. — Maine, Massachusetts, Connecticut, New York, Pennsyl- 

 vania, Maryland, Tennessee, Illinois, Minnesota, Ohio, Nebraska, Missouri, 

 Kansas, Colorado, Wyoming, Vancouver's Island C?), west coast of America (?). 



C. sps'etHS, Uhler, MSS. 



Syn., Acridiurri spretum, Thos., Trans. 111. St. Ag. Soc, V, 450. 



Very much like C.'femur-rubru?n, Burm., the principal difference being 

 in the length of the elytra and wings ; a notch at the tip of the last ventral 

 segment. Posterior lobe of the pronotum slightly expanding ; median some- 

 what distinct. Elytra and wings pass the abdomen about one-third their 

 length. The last ventral segment, which is turned up almost vertically, is 

 somewhat tapering, and is notched at the apex, which distinguishes it from 

 the femur-ruhrum ; the notch is small, but is distinct. Prosternal spine 

 robust, sub-cylindrical, transverse. Migratory. 



Color. — Scarcely distinct from the C. femur-ruhrum. The occiput and disk 

 of the pronotum generally reddish-brown ; the posterior lobe somewhat paler 

 than the anterior and middle. Spots, as in femur-ruhrum, arranged in a Hne 

 along the middle of the elytra ; these are a little larger and more abundant 

 toward the apex. The head and thorax are sometimes a very dark olive- 

 brown ; at others, reddish-brown, and even brownish-yellow, the color 

 deepening with age. The wings are pellucid, nerves dusky toward the apex ; 

 when flying high and against the sun, their wings look like large snow-flakes. 



Dimensions. — 9 Length, 1 to 1.2 inches; elytra, as long as the body; 

 posterior femora, 0.55 inch ; posterior tibiae, 0.5 inch. ^ Length, 0.85 to 1 

 inch; elytra, 0.9 to 1.05 inches. 



Illinois, Iowa, Missouri, Nebraska, Kansas, Colorado, Wyoming, LTfah, 

 Idaho, Nevada, Moid ana, ]\Iiiinesota, and Dakota (Thomas, l)y examination and 



