>"- SrP.FAMILY X. (TUCr 



fine and very sparse; it also differs in its decidedly shorter beak 

 {nd smaller, more rounded scutelluin. (Casey.) Larvne, pupa 

 and freshly emerged adults were found in the base of the stalk 

 of a species of cocklebur (XantJiimn ) at Tottenville, Staten Is- 

 land, in September. Pierce has described the work of an allied 

 species in Xuiitltiuiii coin i mi DC liritt. in Texas. The larva 1 feed 

 in the stem and burrow down toward the root where they pupate ; 

 in the Staten Island case just below the level of the sandy soil in 

 which the plant grew. Schwarz also reared a species of Baris 

 from roots of Xunlliluin. 



GROUP B. 



To this group as above defined belong- eight of our eastern 

 species. The males have the first ventral segment feebly and 

 broadly impressed at middle. 



KEY TO SPECIES OF GROUP P-. 



a. Punctures of thorax sparsely, sometimes very remotely placed, 

 ft. Punctures of intervals of elytra fine. 

 c. Legs black or piceous. 



d. Upper surface intense black, not polished; form oval, strongly 

 convex; larger, 5.8 6 mm. 525. SUBOVALIS. 



(Id. Upper surface highly polished and with a more or less pro- 

 nounced bronzed lustre; length not over 4.5 mm. 

 e. Disc of thorax with a wide but ill-defined elongate median 

 smooth space; beak of female two-thirds as long as thorax. 



526. i.rmucA. 



ee. Disc of thorax without smooth space; beak of female not 

 more than one-half as long as thorax. 527. TUMESCEXS. 

 cc. Legs red, tarsi black; punctures of thorax large, very sparse, 

 feebly impressed. 528. XITIDA. 



lib. Punctures of intervals coarse, rounded; prosternum distinctly im- 

 pressed; elytral setae semi-erect and conspicuous; beak of male 

 one-half as long as thorax. 529. FLORIDEXSIS. 



. Punctures of thorax close-set and even, never separated by more than 

 their own diameters; those of intervals generally .large and more 

 or less approximate. 



f. Upper surface uniform brown, feebly bronzed; beak strongly punc- 

 tured; intervals coarsely and rugosely punctate; length 4.2 4.5 

 mm. 530. srn.EXEA. 



//. Upper surface black or piceous, never bronzed or brassy; beak finely 



punctured. 



(j. Alternate intervals of elytra wider, their punctures confused; 

 surface finely alutaceous; length 3.5 4.8 mm. 



531. TNTERSTITIALTS. 



fi<l. Intervals of equal width, each with a single row of coarse, close- 

 set punctures, those on the third sometimes slightly confused; 

 surface not alutaceous; length 3.2 3.6 mm. 532. DOLOSA. 



