4 MISC. PUBLICATION 6 9 8, IT. S. DEPT. OF AGRICULTURE 



new subfamily Dysidinae for Dy sides Perty (1832) and Apoleon 

 Gorham (1885), and (1938) placed the Dysidinae in the Bostrichidae 

 between the subfamilies Euderiinae and Endeeatominae. Since the 

 beetles of Dysidinae clo not have the head deeply inserted in the pro- 

 thorax and it is distinctly visible from above, this subfamily is also 

 closely allied to Psoinae. 



Dysides obscurus Perty 



Dy sides obscicrus Perty, 1832, Delectus Animalium Articulatorum Ins. Brasil, 

 p. 113, pi. 22, fig. 14; Westwood, 1835, Mag. Zool., CI. 9, pi. 123; Lesne, 1894, 

 Soc. Ent. de France Ann. 63: 18-21; 1938, in Junk (pub.), Coleopt. Cat, pt. 

 161, p. 4. 



Male. — Uniformly dark to light reddish brown, except palpi and 

 antennae, which are brownish yellow. 



Head densely, rather coarsely granulose on front, very finely, 

 sparsely granulose on occiput, the granules round on front and trans- 

 verse on occiput, densely clothed with short, erect, arcuate, whitish 

 hairs; clypeus concave, broadly, shallowly emarginate in front, 

 densely, finely rugose or granulose, densely clothed with short, erect, 

 arcuate, whitish hairs; clypeal suture distinct, curved forward 

 between sides of clypeus and lateral lobes ; labrum smooth at middle. 

 Antennal club with the segments narrowly oblong, second and third 

 segments petiolate at bases, the third distinctly longer than second, 

 and narrowly rounded at apex. 



Pronotum much wider than long, widest along basal half, with a 

 narrow, transverse groove along base, a triangular, median flattened 

 space along anterior margin, and a narrow, longitudinal, median 

 groove on basal half ; sides parallel on basal half, arcuateiy converging 

 anteriorly, with a number of small tubercles near margins ; posterior 

 angles rectangular, each with four teeth ; disk with four rather acute, 

 erect tubercles, placed in a transverse row near middle, and a few 

 smaller tubercles scattered over apical half, surface finely densely 

 granulose, the granules distinctly separated, densely, uniformly 

 clothed with short, erect, arcuate, whitish hairs. 



Elytra at base subequal in width to pronotum along basal half ; sides 

 gradually expanded to apical fourth, then arcuateiy converging to 

 the apices, which are separately rounded; apical declivity regularly, 

 arcuateiy cleflexed ; surface densely, finely, uniformly punctate, finely 

 granulose on basal region, densely, uniformly clothed with short, 

 erect, blackish hairs (with whitish and blackish hairs intermixed 

 on the pale brown specimens). 



Abdomen beneath densely, finely punctate, densely, uniformly 

 clothed with short, erect hairs, similar to those on dorsal surface of 

 elytra; last visible sternite broadly depressed at middle, broadly 

 rounded at apex, and clothed with longer, erect, black hairs. 



Female. — Differs from the male in having the clypeus bilobed and 

 deeply, broadly, arcuateiy emarginate in front, the segments of the 

 antennal club robust, with the first and second segments subtriangular 

 and subequal in length to each other, and the third segment oblong, 

 longer than the eighth, and subtruncate at the apex, and the last vis- 

 ible abdominal sternite without a median depression. 



Length 5-14 mm., width 4-4.5 mm. 



Type locality. — Piauhy Province, Brazil; present -location of the 

 type is unknown to the writer. 



