Vol. XXV] ENTOMOLOGICAL NEWS 197 



sae (PI. VIII, h), and numerous long, strong, spiny hairs, six ar- 

 ranged along the occipital border, two in each temple, four in a trans- 

 verse series about even with the deepest part of the antennal fossae, 

 and eight or ten others anterior to this line. On the other side are a 

 few hairs of which two, one in each temporal region, are particularly 

 long and conspicuous. 



The thorax is long and slender, the effect of narrowness being 

 heightened by the coloring which is paler in the lateral margins and 

 angles. The prothorax has a salient blunt lateral projection on each 

 side (PI. VIII, /) and bears six spiny hairs on its dorsal surface. On 

 each lateral process are two short, curved spine-hairs. The long pen- 

 tagonal mesothorax has straight lateral margins and bears about a 

 score of strong spiny hairs on its dorsum, including two on each lateral 

 margin. In addition each lateral margin bears two short pointed spines. 

 The short metathorax, plainly set off from the mesothorax by a suture, 

 bears about thirty long spiny hairs on the dorsum, unevenly disposed 

 in two transverse series. On the under side of each thoracic segment 

 there are two series of long, spiny hairs, arranged in lines converging 

 posteriorly so as to form a V. 



The fore legs are a little shorter than the middle and hind ones and 

 markedly different in make-up. The femora have no clinging pads 

 as have the second and third legs, the first tarsal segment has a strong 

 thumb-like lateral process, and the second segment is not elongate and 

 bears a normal claw (PI. VIII, d, e). The femora of the second and 

 third pairs of legs have a well-developed clinging pad on the side, the 

 first tarsal segment is short, ring-like and inconspicuous, while the sec- 

 ond is long, transversely striated and looks like a large, heavy, slightly 

 bent claw (PI. VIII, /, g). As a matter of fact the real claw is simply 

 the slightly differentiated tip of this claw-like segment. (This condi- 

 tion of tarsal segment modified to be a claw-like and tarsal claw acting 

 as its continuous tip is common to most Gyropi.) 



Abdomen not quite twice as long as wide, and one-fifth shorter in 

 the male than in. the female, about 2 l /2 times as long as the thorax in 

 the male, and three times as long in the female. Conspicuously covered 

 above and below with long, spiny hairs, not evenly arranged in one 

 or two transverse rows as in most Gyropi, but irregularly disposed, 

 although approaching a rough arrangement in three rows (PI. VIII, ). 

 Posterior border without hooks or spines or other projecting pro- 

 cesses, except a few conspicuous long hairs (PI. VIII, a and i). Each 

 segment with a long spiny hair in each postero-lateral angle. Male 

 genitalia as shown in PI. VIII, c. 



Numerous males and females taken from a vizcacha, Lagi- 

 dium peruanum Meyen, Ninahuanchi, Peru, 13,000 it. altitude, 

 C. H. T. Townsend, collector. 



