94 



middle; posterior extremily obtuse-angled. Elytra and wings narrow and 

 shorter than the abdomen ; the former not dilated on the costal margin. 

 Male less than half the size of the female. Antennae filiform, slightly flat- 

 tened ; joints sub-distinct, those of the female about as long as the head and 

 thorax, of the male more than half the length of the body. 



Color (dried after immersion in alcohol). — Yellowish with brownish 

 spots and stripes. Face yellow ; cheeks yellow and fuscous ; in some indi- 

 viduals there is a slight fuscous stripe along the occiput ; there is usually a 

 dark stripe behind the eye, extending along the side-of the pronotum, but this 

 is very variable and sometimes entirely wanting. Pronotum with alternating 

 dashes of yellow and brown ; lateral carinse yellow ; corners of the disk of 

 the posterior lobe dark-brown. Elytra pale reddish-brown, fading toward 

 the apex ; four triangular brown spots in a row along the middle field, and a 

 few dots of the same along the I'ower field. Wings pellucid ; nerves mostly 

 white. Alidomen with rings of yellow and brown Posterior femora with 

 three oblique brown bands more or less distinct. Antennse yellowish at 

 base, dusky toward the apex. Under surface yellow. 



Dimensions. — 9 Length, 0.88 inch ; elytra, 0.4 to 0.5 inch ; posterior 

 femora, 0.5 inch. $ Length, 0.54 inch ; elytra, 0.31 inch. 



Colorado, Wyoming (Thom.as). 



Remark — The living insect is a pale pea-green, where the dry is yellow. 



Var. a. — Face nearly vertical ; frontal costa more prominent and some- 

 what sulcate ; latei'al carinas not so much curved and less divergent. Lateral 

 carinae of the pronotum less approximate. The yellow spaces, especially on 

 the elytra, broader and paler; the brown more restricted. Size same as the 

 other variety ; locality the same. Position uncertain. 



Si. §-r»cilBS, Scudd., U. S. Geol. Surv. Nek, Final Rep., 250. 



Vertex of the head broad, swollen, with elevated anterior border; foveolge 

 extremely shallow, long, triangular, with the base toward the eye. Lateral 

 carinse of the pronotum rather prominent, regularly curved, approximate in 

 the middle; median carina slight; hind border of the pronotum a little angu- 

 lated ; middle of the lower border produced into a rounded projection. 



Color — Slightly mottled, pale reddish-brown; a stripe of the deeper tint 

 just behind the eyes, bordered above by the yellowish lateral carinpe of the 

 pronotum. Elytra nearly uniform in color, but with two or three small spots 

 )u the central field. 



