420 Materials for a Monograph 



last (seventh) which is very large, triangular, three times 

 the width of the sixth, produced posteriorly to a blunt 

 rounded apex, the segment concealing the abdominal ap- 

 pendages altogether; the abdomen is a little longer than 

 broad, regularly and but little rounded at the sides. The 

 eyes are small, reniform, subglobose, the longitudinal di- 

 ameter lying in the plane of the head ; no ocelli ; antennas 

 inserted in a broad circular depression, and about half the 

 length of the body ; first joint twice as long as the second, 

 second as long as the third and fourth, third as long as the 

 fourth and fifth ; the terminal joints somewhat moniliform, 

 the whole profusely covered with short hairs; third and 

 fourth joints of the maxillary palpi equal, the last a little 

 longer, considerably thickened at the termination. Legs 

 compactly fitted to one another beneath the spreading 

 sides of the thoracic segments ; the femora broad, short, 

 flattened, smooth, without a trace of spines, save one or 

 two small ones at the tip upon the hind border, generally 

 upon the upper edge only ; tibite of fore legs very short and 

 heavy, thickened at the tip ; those of the other legs sim- 

 ilar in character, but becoming longer posteriorly, — all 

 thickly covered with heavy spines ; tarsi with the first 

 and last joint nearly equal in length, (on the anterior pair 

 the last is much the longest) and equal to the three mid- 

 dle joints; well-developed claws, but with no pad between 

 them; the abdominal appendages cannot be seen except 

 through the gaping of the dorsal and ventral shields of the 

 seventh segment ; the cylindrical hairy cerci in both sexes 

 are so long as just to reach the apex of the triangular 

 supraiinal plate ; the styles of the $ are very small. 



1. C. PUNCTULATUS, UOV. Sp. 



Above of an uniform dark shining mahogany-brown 

 color, a little deepest at the posterior extremity ; beneath a 

 little lighter, with a reddish yellow tint, especially upon 

 the coxae, and to be seen also on the mouth parts and the 

 sockets of the antennae ; antennae dirty brown ; the whole 



