DAM^US GENIOULATUS. 433 



The femora gradually thicJcen from the proximal until 

 near the distal ends, the heads being indistinctly marked 

 off from the peduncles. Genuals and tibia3 slightly en- 

 larged toward the distal ends. Tarsi with pedun- 

 culated, more or less diamond-shaped, proximal parts, 

 and rod-like distal portions, slightly curved at the 

 ends, but not very thin nor long. There is a whorl of 

 thick, black, stiff, slightly serrated, curved hairs or 

 spines on each of the three central joints of each leg; 

 three on the peduncle of each front, and one on that 

 of each hind femur ; two on each coxa of the third, and 

 one on each of the fourth pairs : there is a fine, but 

 short, tactile hair on each tibia and the usual fine hairs 

 on the tarsi. 



Abdomen slightlj pyriform, not truncated ; standing 

 considerably above the base of the cephalothorax. 

 There is an anterior depressed portion, of some size, at 

 the antero-lateral angles ; the outer edge of this is cut 

 into three large teeth, between the first and second of 

 which the third leg is articulated, and a rounded poste- 

 rior lobe to which the fourth leg is articulated. There 

 is an elliptical series of about eighteen black hairs on 

 the notogaster similar to those on the legs but larger, 

 curving outward and backward, a pair on the poste- 

 rior margin and two spike-like processes near the pro- 

 gaster. Genital and anal plates nearly square, near 

 together. The chitinous piece inside the anal plates 

 very large and strongly marked. 



Nymph. 



This may probably be the creature described by 

 Koch under the name of DamcBus torvus. Nicolet was 

 of opinion that it was. Koch's drawing appears to 

 have the abdomen rather long and the legs rather short 

 for the nymph of D. genicidatiis, and Koch would not 

 often find one so clean to draw ; still, probably this was 

 the creature. 



VOL. II. 28 



