200 Trans. Acad. Sci. of St. Louis. 



gate, parallel for a long distance behind the eyes to the broadly 

 rounded angles; prothorax distinctly longer than wide, obviously nar- 

 rower than the head, subparallel and nearly straight at the sides, 

 rather coarsely,' sparsely and only moderately strongly punctate; 

 elytra unusually short, but little longer than wide, the sides very 

 feebly diverging from the base, becoming slightly arcuate posteriorly, 

 about one-half wider than the prothorax but only about a third longer, 

 finely, feebly and rather sparsely punctate; gular sutures moderately 

 separated but obliterated, the intermediate surface not differing 

 materially from the remainder. Male unknown. Length 2.9 mm.; 

 width 0.55 mm. California (Humboldt Co.) deceptor n. sp. 



11 — Male with the posterior margin of the fifth ventral segment lobed in 



the middle ^2 



Male with the posterior margin of the fifth segment not distinctly lobed.. 13 



12 — Body rather slender, deep polished black throughout, the legs blackish 



with the tibiae and tarsi gradually paler; reticulation obsolete; head 

 distinctly elongate, with broadly rounded sides basally, the base trun- 

 cate, the punctures minute but perforate as usual, rather sparse; pro- 

 thorax very distinctly narrower than the head and obviously longer than 

 wide, more coarsely but sparsely and more or less strongly punctate, 

 parallel and nearly straight at the sides, the apical angles broadly 

 rounded and more than a fifth from the apex ; elytra distinctly elongate, 

 parallel, large, about three-fifths wider and longer than the prothorax; 

 gular sutures rather less widely separated than usual and almost com- 

 pletely obliterated. Male with the fifth segment strongly lobed at the 

 middle, the lobe much wider than long, about a fourth as wide as the seg- 

 ment and broadly, transversely truncate at apex, the adjoining surface 

 ovally and somewhat feebly impressed in apical half, the sixth segment 

 with a large angulate notch, somewhat deeper than wide and narrowly 

 rounded anteriorly, with Its diverging sides feebly sinuate posteriorly, 

 the surface of the segment narrowly and feebly impressed around and 

 in front of the angle. Length 2.8-3.0 mm.; width 0.5-0.6 mm. Cali- 

 fornia (Truckee, Sonoma and Monterey), Nevada (Reno), Oregon (Albany, 

 Newport and the Dalles) and at various localities in Washington State. 



pnnctatns Csy. 

 Body nearly as in punctatus but more slender and very much smaller, deep 

 polished black throughout, the entire legs and antennae more or less 

 pale brown; head nearly as in punctatus but not quite so elongate, the 

 prothorax relatively still narrower and more elongate, as long as the 

 head but much narrower, the sides parallel and straight, the punctures 

 sparse and feeble ; elytra relatively narrower and more elongate, paral- 

 lel, about two-fifths wider and longer than the prothorax, shining and 

 finely, rather sparsely punctate. Male with the secondary characters 

 nearly as in punctatus, the lobe of the fifth segment smaller, though 

 equally strong, and not more than a fifth as wide as the segment, more 

 rounded and less truncate at apex, the surface more strongly and cylin- 

 drically impressed almost to the base of the segment; notch of the sixth 

 segment almost similar but with its anterior angle rather less narrowly 

 rounded. Length 2.6 mm.; width 0.4 mm. California (Mokelumne 

 Hill, Calaveras Co.) , — Dr. Blaisdell Alius n. sp. 



