378 KINCAID 



side, strongly convex above, flattened beneath, abdomen broadest to- 

 wards the posterior end. Length 7 mm. 



Head broader than long, subglobose, delicately granulose ; median 

 impressed line well developed, front with a deep fovea on each side. 

 Clypeus transverse, short, slightly emarginate in front, rounded at the 

 sides. Labrum twice as broad as long, the frontal margin bilobate and 

 deeply incised in the center. Mandibles stout, flattened, broad at base, 

 narrowing towards apex, which is crowned by a series of fine sharp 

 subequal teeth, the tips of the teeth in a regular curve. Antennae ex- 

 tremely small and short, apparently three-jointed, the basal joint but- 

 ton-shaped, the second much smaller and of similar form, the third 

 minute, conical. Ocelli six, arranged in two series; a group of four, 

 arranged in the form of a square, just behind the antennae ; a second 

 group of two ocelli, immediately below that organ. Maxillae as 

 long as the mandibles; car do small, fusiform; stipes stout, quad- 

 rangular; galea elongately oval, thickly setate on inner margin to- 

 wards apex ; maxillary palpi not greatly exceeding galea, four-jointed, 

 first joint large and stout, button-sbaped, second of the same breadth 

 as first but only one-third as long, third a little longer than first, but 

 not so broad, tapering slightly, fourth joint as long as first, conical. 

 Mentum oval, embracing the ligula, which is conical and which bears 

 a pair of short palpi ; the latter are two-jointed, the first joint very 

 broad and short, the second longer and conical. 



Pronotum longer than the mesothorax but not so broad, delicately 

 granulate; mesothorax and metathorax similar in appearance to the 

 succeeding abdominal segments. Legs short and stout with a few 

 scattered seta3. 



Dorsal scutes of the abdomen each divided by a transverse furrow 

 into an anterior and posterior convex area ; each ^rea bears across its 

 middle an irregular row of small tubercles which are surrounded by 

 brown dots and bear at their tips very minute setoi. 



Pupa short, compact, dorsal surface moderately convex ; pronotum 

 set with numerous fine bristles; dorsal abdominal segments with a 

 row of bristles along their posterior margin; terminal segment bearing 

 a stout spine at apex. Length 7 mm. 



Described from larvte and pupic found beneath moss on St. Paul 

 Island, Alaska, in the month of August. The larvai feed upon the 

 dwarf willows, but remain hidden during the daytime. 



