AMERICAN COLEOl'TERA. 157 



of the latter being all normal. This abnormal leg is less chitinous 

 than the others. 



In Dr. Horn's Collection. 



Scarites substriatiis, Ilald. 



I have tried to represent in fig. 5 a monstrosity on the right side of 

 the dorsal surface of the prothorax in a specimen of Scarites suhstriatus. 

 It consists of a tubercle about a thirty-second of an inch long, pro- 

 jecting outward and slightly forward. It arises a thirty-second of an 

 inch transversely from the middle of the right margin of the thorax. 

 It is deeply cleft on the summit, almost transversely. Fig. 4 a, repre- 

 sents it when viewed from the side. 



Collected in Texas. In Dr. Horn's Cabinet. 



Dyscliirins globulosns. Say. 



The anomalous right anterior leg of a Di/schirins glohulosus is shown 

 in fig. 6. Fig. 5 a, represents the normal right leg. The deformity 

 consists in the third joint of the tarsus bearing two branches of two 

 joints each. The inferior terminal spur of the tibia is wanting. The 

 first two joints of the right tarsus are normal j the third a little longer, 

 more clavate and obliquely truncate on each side at tip for the articu- 

 lation of the double set of joints which follow. The two anomalous 

 branches arise on each side of the sharp apex thus formed, one directed 

 to the left the other to the right. The first joint on each branch is a 

 little shorter and stouter than a normal fourth joint; while the termi- 

 nal or claw joint does not differ greatly in length. The claw joint of 

 the inner or left branch bears a pair of normal claws, the outer claw 

 joint is somewhat broader and bears two sets of claws curved from 

 each other. 



In Dr. LeConte's Cabinet. 



Chlieuiiis diffinis, Chaud. 



Fig. 7 represents a deformity in the left middle leg of a specimen 

 of Chlxiiius diffinis. The tibia at a point a little below the middle 

 bifurcates, the inner bifurcation continuing to normal length bears 

 the tarsal joints. The outer is about two-thirds as long as the inner. 

 It appears from its size and form that this branch bore a set of tarsal 

 joints similar to those seen on the inner; and this opinion is strength- 

 ened by the fact that the end is somewhat ragged and seems to have 

 been broken oiF. 



In Dr. Horn's Cabinet. 



