NORTH AMEKK'AN C0LK0PTP:RA. 108 



as broadly so. The legs, when iimture, differ in color in the two 

 species, but immaturity in the present species would render this an 

 indefinite character. The character shown by the first ventral seg- 

 ment of the male is a positive means of separation. 



Hub. — Canada, New York and New Jersey (Da Costa, Wenzel), 

 Upper Mississippi (LeConte). 



S. collaris Mels. — Regularly oval, jjiceous, moderately shining, head and 

 thorax reddish yellow, the latter with a pieeous medio-hasal area of variable ex- 

 tent, apex of elytra narrowly pale. Head spai-sely finely punctate. Thorax 

 narrower in front, sides feebly arcuate, surface sparsely punctate, more distinctly 

 at middle than at sides, basal marginal line feebly distinct. Elytra punctate, the 

 punctures not coarse nor close ; prothorax beneath yellow, the prosternal lines 

 entire, convergent in front ; metasternum at sides coarsely and closely punctate, 

 the mesocoxal line joining the lateral suture one-fourth from the front. Abdomen 

 closely punctate, piceous, the last three segments usually yellowish, metacoxal 

 line forming a complete arc, very nearly as long as the segment. Legs entirely 

 reddish yellow. Length .08— .09 inch. ; 2— 2.25 mm. PI. II, fig. 1. 



The male has the fifth ventral broadly and deeply emarginate, the 

 first ventral at middle finely and closely punctate, without pubescence. 



The color of the thorax varies ; the piceous area may be merely a 

 small space in front of the scutellum, or it may occupy a full third 

 of the surface. The abdomen may vary in color, so that even the 

 sides of the first two segments may be pale. The legs seem unifbrndy 

 reddish yellow. 



Under the name collaru are included several described by Mulsant 

 and LeConte, evidently from inadequate matei'ial ; these are chatchas 

 and fadii J kit u.^ Muls. and caudalis, cousobrinus and socer Lee. 



Closely allied also is puncUcoUlx Lee, wdiich may be separated 

 empirically by the color of the legs, and certainly by the male char- 

 acters. 



Hob. — Canada; southward to Florida and Texas, westward to 

 Illinois and Nebraska. 



S. cervicalis Muls. — Oval, outline continuous, convex, head, thorax and 

 legs reddish testaceous, elytra piceous. at apex narrowly bordered with reddish 

 yellow. Head sparsely punctate. Thorax narrower in front, sides arcuate, surface 

 very sparsely punctate, basal marginal line distinct. Elytra moderately coarsely, 

 but not closely punctate : prosternum more or less yellow, the elevated lines 

 slightly convergent to the front; metasternum at sides moderately closely punc- 

 tured, the mesocoxal line joining the suture one-third from apex. Abdomen 

 black, the terminal .segments pale, metacoxal line forming a complete arc shorter 

 than the segment. Length .06 — .09 inch. ; 1.5 — 2.25 mm. 



The prosternal lines vary in length, being at times short not pass- 

 ing the coxte, or they may attain the front of the prosternum. Th(> 



TRANS. XU. ENT. .SOC. XXII. M.W. 1895. 



