LUCY WRIGHT SMITH 
461 
Pteronarcella torosa new species 
Adult 
Distribution . — Santa Fe, New ^Mexico. 
cf — Length of body, 16 min.; length of antennae, 1 1 mni.; expanse of wings, 
12 mm. 
Pitch brown, paler beneath. Head a little broader than the prothorax, 
lateral anterior margins carinated, a square black spot across the ocelli; on 
cither side of the ocellar triangle a conspicuous pale yellow tubercle; labrum 
pale yellowq carinae pale; a broad pale band along the inner margins of the 
compound eyes, antennae pale, darker toward the tip. 
Prothorax dark brown, a little wider than long, sides straight, anterior and 
posterior margins a little convex; angles round; a small median pale spot on 
the anterior margin, a larger more prominent one on the posterior border, 
coarse pale sculpturings on the disc. Meso- and metathorax dark brown 
above, the entire thorax yellow beneath. Trochanters and coxae yellow. 
Wings very small, browmish, veins browm, venation greatly reduced. 
Male. Abdomen cylindric, dark browTi above, pale beneath. The first 
dorsal segment with a conspicuous median whitish spot. The dorso-lateral 
posterior margins of segments two to nine with prominent, hairy, rounded 
knobs. The posterior border of the ninth dorsal segment truncate; between 
the two knobs on this segment a rather shallow, narrow, scoop-like projection 
pointing anteriorly. The median ventral region of the ninth segment cut off 
by lateral carinae, its margin produced, evenly rounded. The tenth segment 
and the supra-anal plate entirely concealed by the ninth. The sub-anal plates 
pale yellow, with dorsal appendage-like projections pointing anteriorly, the 
tips reaching the base of the scoop (fig. 30). 
Type specimen, a male from Sante Fe, New ^Mexico, (P. B. 
Powell), VI, 1, 1904, in the entomological collection at Cornell 
University, Ithaca, N. Y. 
Female unknown. 
Nymph 
cf. — Length of body, 16 mm.; length of antennae, 7 mm.; length of setae, 
5 mm. 
9. — Length of body, 23 mm.; length of antennae, 8 mm.; length of setae, 
8 mm. 
Chestnut-brown. Head considerably narrower than prothorax; ocelli black- 
ish; a dark brown, rectangular spot extending through the ocellar triangle, 
beyond it on either side a pale round spot; palpi pale yellow; antennae light 
brown, of about forty-one segments, the supra-antennal plate narrow; the 
occipital margin with reticulate corrugations. 
Prothorax nearly twice as broad as long, front margin straight, hind margin 
and sides convex, angles produced, well rounded; a slight indication of a 
narrow median yellow line, broadened at the ends; the disc with embossed 
markings (fig. 37). Legs paler than body, especially tibiae and tarsi. 
TRANS. AM. ENT. SOC., XLIII. 
