TRIBE IV. PISSODINI. 179 



The sexes differ as follows : In the males there are eight in- 

 stead of seven visible abdominal termites, the seventh being known 

 by its broadly retnse hind margin, while the eighth, or pygidium, 

 is prominent with the tip broadly rounded. In this sex the inner 

 apical tooth of the tibia 1 is usually more prominent. The beak of 

 the female is longer, smoother and more slender than that of male. 

 The genus has been recently excellently treated by 



Hopkins. A. D. "Contributions Toward a Monograph of the 

 Bark-Weevils of the Genus Pissodes," in Bull. 20, Ft. T, 

 Tech. Ser. U. S. Bur. Entom., 1011. 



In this bulletin Hopkins recognized 30 species as belonging to 

 the fauna of the United States, 12 of which occur east of the 

 Mississippi River. We have followed his key in separating them 

 as follows: 



KEY TO EASTERN SPECIES OF PISSODES. 



a. Elytral intervals 3 and 5 broader or more elevated than 2 and 4; 



hind tibiae of male without long fringe of hairs. 

 l>. Elytra always with anterior and posterior spots of densely placed 



pale scales. 



c. Beak moderately stout, shorter than thorax, the latter with hind 



angles obtuse; posterior spot of elytra very large and with 



distinct dark border; length 3.7 4 mm. 237. SIMILIS. 



cc. Beak slender, shorter or longer than thorax, the latter with hind 



angles rectangular. 



(1. Elytra with sides parallel, the anterior and posterior spots 

 large; beak never longer than thorax, the latter densely punc- 

 tured; length 4.5 6 mm. 238. STROBI. 

 dd. Elytra with sides usually distinctly narrowed behind and with 

 small to moderately large anterior pale spot and posterior 

 brown and white spots, the latter usually separated; beak 

 longer than thorax. 

 e. Posterior brown spots moderately large; length 4.3 6.7 mm. 



239. APPROXIMATUS. 



ee. Posterior brown spots small. 



f. Elytra noticeably narrowing from the base to apical third; 



length 5 7.7 mm. 240. NEMOREXSIS. 



ff. Elytra not noticeably narrowing behind the base; length 



4.2 5.8 mm. 241. DKODARJE. 



l>1>. Elytra usually without distinct anterior spots and with the posterior 



ones in front of the vertex of declivity. 

 g. Punctures of thorax distinctly separated, those of elytral striae 



small to coarse. 

 //. Thorax not narrower than elytra. 



i. Thorax short, stout, deeply constricted in front, its sides 

 strongly rounded; length 4.2 5.2 mm. 242. FISKEI. 



ii. Thorax subelongate, not deeply constricted in front; length 

 4.26 mm. 



