120 Trans. Acad. Sci. of St. Louis. 



northern Asia and Europe ; it descends along the mountains 

 in America as far south as Colorado. It is not at all closely 

 related to Lathrotaxis^ which follows, although classified 

 under the same head in the table on account of the form of 

 the gular sutures, but, as before stated, belongs with Lathro- 

 tropis and Eulathrobium. The few species thus far brought to 

 light within our territories may be briefly described as fol- 

 lows : — 



Body broader and stouter, the prothorax but slightly elongate; pale rufo- 

 testaceous throughout, the antennae and abdomen dusky; head large, 

 fully as wide as long, parallel and nearly straight at the sides, the 

 base broadly arcuato-truncate, the angles moderately broadly rounded; 

 eyes moderate, the punctures rather small and close-set, sparse on the 

 vertex; antennae but little longer than the head and prothorax, rather 

 slender, the medial joints decidedly longer than the subapical and fully 

 twice as long as wide; prothorax distinctly narrower than the head, 

 widest anteriorly, the sides distinctly converging to the base and 

 nearly straight, a fourth or flfth longer than wide, the anterior angles 

 moderately broadly rounded, the punctures rather small but deep, 

 irregular, close-set near the subelevated median line, the latter nar- 

 rowly impressed behind the middle for a short distance; elytra slightly 

 elongate, as wide as the head, subparallel with the sides feebly arcuate, 

 scarcely longer ihao the prothorax and about a fourth wider, coarsely, 

 very closely and subliuearly punctate; abdomen parallel, about as wide 

 as the elytra, finely, closely punctate. Male with ventrals two to five 

 strongly, not very broadly impressed along the median line throuijhout, 

 the fifth with a broadly rounded shallow sinus as wide as the attend- 

 ant impression; sixth broadly impressed throughout in median third in 

 continuation of the preceding impressions, the apex with a narrower 

 and abruptly formed sinus nearly as deep as wide and widely rounded 

 at the bottom; impression anteriorly with a large patch of short 

 black spiculiform hairs narrowly divided along the middle; female 

 unknown. Length 7.0 mm.; width 1.1 mm. Washington State (Thurs- 

 ton Co.) tacomae n. sp. 



Body narrow and slender, the prothorax narrow and notably elongate; 

 medial joints of the antennae about equal in length to the subapical and 

 much less than twice as long as wide 2 



2 — Sides of the prothorax feebly converging from apex to base, broadly 

 and almost evenly arcuate throughout; dark fusco-testaceous, the 

 elytra flavo-testaceous, gradually blAckish-piceous in basal half; ab- 

 domen piceous- black, the legs dark ferruginous, the antennae du!*ky, 

 longer than the head and prothorax, rather stout, feebly incrassate dis- 

 tally; head rather longer than wide, parallel and broadly arcuate at the 

 sides, the base broadly arcuato-truncate, somewhat wider than the ely- 

 tra, with the basal angles moderately broadly rounded, the punctures 

 rather fine but deep and close-set toward the sides and base; prothorax 

 much narrower than the head, a third longer than wide, the apical angles 



