374 Trans. Acad. Sci. of St. Louis. 



the summit of the deflexed flanks; abdomea parallel, narrower than 

 the elytra, distinctly and rather sparsely punctured throughout. 

 Length 11.0 ram.; width 1.4 ;mm. Mexico (Guanajuato), — Dr. Dug^s. 



dngesi n. sp. 



This species, sent me many years ago, appears to differ 

 from scuteUaris, the type of the genus, in having the tip of 

 the abdomen red and in its somewhat smaller size. The 

 scutellum has five or six coarse close-set punctures as in 

 scuteUaris. 



HoMALOLiNUS Shp. — This genus comprises a number of 

 neotropical species of very depressed form and rather large 

 size, living under the bark of dead trees. The species serv- 

 ing as the type of the description given in the table may be 

 described as follows : — 



Elongate, depressed, parallel, polished, deep black throughout, the entire 

 fifth and sixth abdominal segments rufous, the legs black, with the tarsi 

 rufous though becoming blackish toward base, the antennae blaek or 

 blackish, with the pubescence cinereous; head behind the antennae but 

 little longer than wide, impunctate, except a transverse line of punc- 

 tures at the extreme base, with a median canaliculation bifurcating 

 anteriorly and a short deep groove at each side; sides nearly straight, 

 parallel, the basal angles but slightly more than right and not at all 

 rounded; flanks behind the eyes rather finely and densely punctate, this 

 punctured area not at all definitely limited above or below; under sur- 

 face impunctate, except near the deep lateral longitudinal grooves; 

 prothorax much shorter than the head and three-fourths as wide, the 

 apical angles rounded, the sides converging posteriorly throughout, 

 sinuate just behind the apical angles; elytra longer than wide, with 

 diverging sides, about as long as the prothorax, toward apex distinctly 

 wider, impunctate; abdomen evidently narrower than the elytra, 

 parallel, sparsely punctate toward the sides. Length 14.8 mm.; width 

 2.0 mm. Guatemala, — G. W. Bock atroniteus n. sp. 



Resembles the Colombian canaliculatus Er., the type of 

 the genus, but larger, with the entire fifth ventral rufous and 

 differing in several other characters. 



Xanthohypnus u. gen. — The type of this genus is the 

 very isolated species described by Dr. Sharp (Biol. Cent. 

 Amer., Vol. 1, Pt. 2, p. 476), under the name Xantholinus 

 strigiceps. It is deep black in color and of singularly com- 

 pact, parallel and convex form. The short longitudinal 

 scratches toward the sides of the head, which become still 



