150 PROCEEDINGS OP THE ACADEMY OP 



Claws of the tarsi stout ; pulvilli remarkably large. Prosternal 

 spine cylindrical, blunt, and bent back to the margin of the meso- 

 sternura. 



Male. Is only about two-thirds the size of the female, from 

 ■which it differs as follows : Frontal carinte more distinct, the 

 middle one more distinctly sulcate. The elytra and Avings are 

 longer in proportion to the body, extending beyond the abdomen ; 

 the posterior femora also proportionally longer. The abdomen is 

 considerably enlarged at the extremity, and turned abruptly up- 

 ward ; the cerci very large, bent upward and inward, broad at 

 base, with an off'set or notch on the lower edge; the little angular 

 processes at the base of the superanal plate are very minute and 

 blunt (much less than in G. sprelus or femur-rnbrum) ; the sub- 

 anal plate convex, pointed, and almost entire, hairy. 



Color (dried after long immersion in alcohol). 



Female. Head and anterior lobes of the pronotum reddish- 

 brown ; labrum and parts of the mouth black ; antennae rufous. 

 Posterior lobe of the pronotum an olive-brown. El3^tra unspotted, 

 olive-brown at the base, fading toward the extremit3\ Wings 

 transparent, with a portion of the nerves near the front and apex 

 dark. Abdomen and under side dark reddish-brown. Posterior 

 femora with the disk and upper edge dark brown, lower edge 

 yellowish ; inside yellow, with an oblique, interrupted, dark stripe 

 running from the upper edge back across to the lower edge be- 

 yond the middle ; knee black. Tibiae have the upper end and lower 

 half yellow, spines black ; tarsi brown ; claws j-ellow at base, 

 black at the points ; pulvilli with a yellow stripe through the 

 middle. 



Male. Yery similar, the principal difference being that the 

 thorax, abdomen, and under side are of a lighter olive or j^ellow 

 color ; an oblique j-ellow stripe immediately behind the middle 

 legs quite distinct and bright. 



When the insect is living, the olive-brown is an olive-green or 

 olive color; and there are yellow spots and stripes on the thorax, 

 and the abdomen and under side are principally yellow. The male 

 is generally of a brighter color than the female. 



Dimensions. Female, length 1.7 in. ; head and pronotum .52 in. ; 

 femora .92 in. ; tibioe .9 in. Male 1.2 in. 



Habitat. Jackson County, Illinois. 



I^ote. — Walker (Cat. Dermap, iv. 610) has placed this species in Cyrta- 



[July 25, 



