Casey — A Revision of the American Paederini. 129 



belongs to this genus, but it differs from any of the above 

 forms in its more parallel sides, relatively smaller elytra and 

 more converging sides of the head behind the eyes — among 

 other characters. The Munich catalogue places castanea 

 Grav., as a variety of longiusculay but I have no means of 

 confirming this at present. 



Pseudolathra n. gen. 



The two species at present comprising this genus are among 

 the smallest known Lathrobiids ; they have a peculiarly de- 

 pressed form and extremely separated gular sutures, short 

 hind tarsi, with the four basal joints very short and subequal, 

 and other characters as stated in the table. They may be 

 described as follows : — 



Form slender, subparallel, shining, the abdomen dull and very densely 

 punctulate; body pale rufo-testaceous, the head blackish-piceous, the 

 elytra sometimes piceous near the scutellum, the abdomen blackish, 

 gradually rufescent toward the tip, the legs and antennae pale; head 

 rather small, not coarsely, very sparsely punctate, slightly wider than 

 long, parallel and straight at the sides, arcuato- truncate at base through- 

 out the width, the angles obtuse but only very slightly rounded ; eyes 

 rather well developed, somewhat prominent, at scarcely twice their own 

 length from the base; antennae rather thick, feebly incrassate distally, 

 nearly one-half as long as the body, the medial joints about one-half 

 longer than wide; prothorax distinctly wider than the head in the male, 

 less obviously so in the female, oblong, only slightly longer than wide, 

 the sides distinctly converging from the strongly marked apical, to the 

 broadly rounded basal, angles, and straight, the punctures fine and very 

 sparse, except a close-set subimpressed series along the median smooth 

 line, which are coarser; elytra slightly longer than wide, a fourth 

 wider and a fifth longer than the prothorax, the sides straight and dis- 

 tinctly diverging throughout, the punctures rather sparse, fine, arranged 

 in unimpressed series, confused toward tip; surface narrowly, deeply 

 impressed along the sutural bead; abdomen nearly as wide as the 

 elytra, minutely, very densely punctulate, Male with the fifth ventral 

 unmodified, the sixth broadly rounded at tip, with a very shallow 

 emargination in the form of a broad cusp, the adjacent surface with a 

 small simple impression slightly longer than wide. Length 3.4 mm.; 

 width 0.63 mm. Texas (Austin, Waco, Houston and Galveston), Louis- 

 iana (Morgan City) and Iowa. \_=^ Americana Duviv.] aualis Lee. 



Form and lustre somewhat similar to the preceding but larger, dark piceous 

 in color, the head and abdomen black, the latter only feebly paler at 

 the immediate tip ; legs and antennae pale ; head email, nearly as long 



