TRIBE III. HYPERINI. 155 



Michigan. Ithaca, N. Y., April 8. Occurs from Quebec, New 

 York and Michigan to Georgia; usually on sandy and muddy 

 ground near water. Often taken by sweeping aquatic plants like 

 Sagittaria and Career. The median carina of beak is evident after 

 the scales are removed, and the ''scattered black dots" mentioned 

 by LeConte as occurring on the thorax of this and other species 

 are only open punctures from which the scales, which form a sort 

 of lid, have been lost. 



196 (8440). LISTROXOTUS SORDIDUS Gyll., Schn., 1834, 280. 



Form and size of tuberosus. Color darker, the gray and fuscous 

 scales more predominant. Thorax slightly wider than long, sides broadly 

 rounded, disc densely punctate, its scales darker than those on sides. Ely- 

 tra as in tuberosus, the intervals feebly convex. Female with last ventral 

 feebly grooved near apex and elytra separately prolonged into short, 

 straight processes. Length 7.5 8 mm. 



Porter and Laporte counties, Indiana, scarce ; June 10 Sept. 

 15. Dorchester, Mass., April 30 June 30. Ranges from Ontario 

 and New England to Lake Superior, south to Georgia and Texas. 

 The elytra are separately, not conjointly prolonged at tip, as 

 stated by LeConte, the processes being much shorter and not con- 

 vergent as in tiiberosus. 



197 (8442). LiSTRONOxrs SQUAMIGER Say, 1831, 11; ibid, I, 271. 



Elongate-oblong. Black, densely clothed with dirty gray or fuscous 

 scales; thorax of fresh specimens with an oblique stripe of cupreous gray 

 scales on the upper sides. Beak twice the length of head, its median 

 carina distinct, entire, the two on each side forming the sulci shorter, 

 feeble. Thorax slightly longer than wide, sides scarcely rounded, ocular 

 lobes prominent, disc densely and finely punctate. Elytra subtruncate 

 at base, intervals each with a single row of short gray seta? which are 

 more prominent on the declivity; alternate intervals somewhat elevated; 

 subapical callus oblong, not prominent, passing imperceptibly into the 

 fifth interval. Last ventral of female with two strongly elevated folds 

 at the tip, converging toward the front, but not meeting, presenting the 

 appearance of a deep excavation. Length 8.5 9.7 mm. 



Northern half of Indiana, scarce; not taken south of Marion 

 County; April 10 August 15. Dorchester, Mass., June 3 July 

 25. Occurs along the margins of lakes and ponds, the larvae liv- 

 ing in the stems of the broad-leaved arrowhead, Sac/ittaria lati 

 folia Willd. Ranges from Quebec and New Jersey to Illinois, 

 south to Georgia, Arkansas and Louisiana. 



198 (8443). LISTRONOTUS CALLOSUS Lee., 1876, 130. 



Black, densely clothed with dirty brownish-yellow and grayish scales, 



