Vol. xxv] ENTOMOLOGICAL NEWS 197 
sae (Pl. VIII, 4), 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 (Pl. VIII, 7) 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 anormal 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, f,g). Asa 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% 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, k). 
Posterior border without hooks or spines or other projecting pro- 
cesses, except a few conspicuous long hairs (Pl. VIII, a andi). Each 
segment with a long spiny hair in each postero-lateral angle. Male 
genitalia as shown in Pl. VIII, c. 
Numerous males and females taken from a vizcacha, Lagi- 
dium peruanum Meyen, Ninahuanchi, Peru, 13,000 tt. altitude, 
C. H. T. Townsend, collector. 
