146 



aa. Body obese ; tboiax broad aud fleshy ; lateral cariua; subdis- 



tiuct ; median carina distinct ohesa. 



A A. Elytra present': 



a. Elytra more than half tUe length of the abdomen : 



h. Prosterual, spine large, acute, bent on the meso-sternum ; elytra 



grayish-yellow eiax. 



bb. Elytra dirty yellowish-brown ; spotted irregularly with darker 



brown borealis, 



aa. Elytra not more than half the length of the abdomen : 



b. Prouotum cylindrical, without cariuaj ; elytra squamieform picta. 



bb. Pronotum more or less carinated : 



c. Antenna} very long, equal to the hind femora ; disk of the pro- 



notum flat, margins acute longicornis. 



cc. Antennae of ordinary length : 



d. Wings entirely absent manca. 



dd. Wings present, though sometimes minute : 



e. Sides of the pronotum parallel : 



/. Three carinse equal, distinct ; head not large unicolor. 



ff. Lateral carin* obtusely rounded ; head large and unusually long 



behind the eyes, the cranium i^rominent nebrascensis. 



ee. Sides of the pronotum more or less divergent : 



/. Anterior border of the pronotum rounded ; posterior border trun- 

 cate zitnniermanni. 



ff. Anterior border of the prouotum sub-truncate 5 hiud border 

 rounded or augulate : 



g. Elytra squamous, rotundate, broader than long borckii. 



gg. Elytra oblong-ovate : 



h. Posterior femora with three white bands dodgii. 



hh. Posterior femora as in C. femur-rtibmm scuddcri. 



P. obesa, Thos., Greol. Surv. Terr., 1871, 454. 



Prosternal spine very short and obtuse ; body of the female fleshy; elytra 

 and wings absent. 



Vertex broadly sulcate ; margins prominent, slightly angulate in front of 

 the eyes, and continuous with the margins of the frontal costa; frontal costa 

 broad, flat, slightly sulcate at the ocellus, not reaching the clypeus ; lateral 

 carinas distinct, but not prominent. Pronotum short, expanding slightly pos- 

 teriorly ; tricarinatc; median carina distinct, continuous; lateral carinse more 

 distinct on the front lobes ; transverse-impressed lines indistinct ; truncate 

 in front and behind ; posterior lateral margin straight ; not covering the meso- 

 notum. Prosternal spine shortened to a simple tubercle. Posterior femora 

 short. Antennas short, sub-moniliform ; joints very short. 



Colo?- (of the living insect, taken from notes in tlie field). — General color 

 dull ulive-brown. Disk and sides of the pronotum and abdomen olive. A 



