174 AunaJs Entomological Society of America [Vol. X, 



head not with "multitude" of hairs as Piaget states for tibialis; 

 shape of thorax (especially metathorax) ; general outline of 

 abdomen; character of abdominal blotches; the distribution 

 of dorsal spines; and in the markings on the eighth and ninth 

 abdominal segments. 



Description of Female. — Total length, 1.72 mm.; length of head, 

 .492 mm.; length of prothorax, .102 mm.; length of metathorax, 

 .102 mm.; length of abdomen, 1.025 mm.; width of head across temples, 

 .471 mm. ; width of prothorax, .369 mm. ; ^\ndth of metathorax, .430 mm. ; 

 ^^^dth of abdoinen, .533 mm. 



Head slightly longer than wdde, unusually elongate, truncate anter- 

 iorly by a wnde, shallow emargination, and produced into the trabccula 

 points just before the antennas. Antennal sinuses shallow. Ocular 

 projections quite noticeable. Temple margins at first parallel one 

 another, then curve abruptly inward to the occipital margin with which 

 they do not fonn angles. The occiput is nearly straight, but slight 

 emarginations occur just mediad of the bases of the occipital bands. 

 Antennal bands broad and distinct, bending abruptly inward just before 

 the bases of the antennae and not continued to the inconspicuous ocular 

 blotch, bent directly backward at the lateral angles of the anterior 

 emargination, forming bars which reach to the mandible bases. A 

 backward-pointing triangular plate which is narrowly cleft to the apex 

 fills the space between the truncated front and the mandibles. Occipital 

 bands narrow and faint, paling before reaching the antennal bands. 

 Between the bases of the occipital bands are a pair of sharply recurved 

 blotches. Two short hairs occur on the truncate front, two at each 

 of the frontal angles, seven along the outer margin of the antennal 

 bands, five on the temples, eight in a curvdng row in front of the man- 

 dibles, and a dozen disposed dorsally on the posterior half of the head. 

 Antennae long, slender, the second joint the longest, the third slightly 

 curving. 



Thorax twice as broad as long. Prothorax roughly rectangular, 

 wnith posterior margin slightly convex with a weak median concavity. 

 A conspicuous spiracle at each lateral border. A weak spine just before 

 each spiracle, a similar one at each posterior lateral angle, and a pair 

 near the middle of the seginent. Metathorax with sides first diverging 

 and ten parallel, posterior margin running slightly forward to fonn an 

 obtuse-angled emargination. A short spine at each posterior lateral 

 angle, and ten along the posterior border of which four are long and six 

 short. Legs conventional. 



Abdomen with sides sub-parallel, -widest on third segment. Seg- 

 ments two to seven, inclusive, with conspicuous lateral spiracles. 

 Segments one to seven, inclusive, with dusky, transparent blotches 

 which are separated from the lateral bands of similar color by narrow, 

 clear spaces. Segment eight with a pair of smoky, elliptical blotches. 

 Segments one to six, inclusi\^e, with a short hair in front of the posterior 

 lateral angles; segment seven with a longer hair at the angles. Seg- 



