484 SUBFAMILY X. CURCULIONIN^E. 



J. C. Arthur from galls caused by a fungus (Cystopiis] on the 

 wild sweet potato, Ipoiitwa pcnuliirata L., and stated by Pierce 

 (1916) to breed in the seed-pods of Ipoiuwa sinuata Ort., in 

 Texas. 



756 (8742). RHYSSEMATUS LINEATICOIXIS Say, 1824, 313; ibid, II, 175. 



Larger and more robust. Elytra entirely black without brownish pub- 

 escent spots; antennae and tarsi dark reddish-brown. Beak more strongly 

 striate and acutely carinate on basal half. Thorax more than twice as wide 

 as long, sides strongly curved, apex scarcely constricted, surface with deep 

 strigse, longitudinal and nearly parallel with the median line, becoming 

 slightly curved near the sides. Length 5.5 6.5 mm. 



Tippecanoe and Vermillion counties, Ind., scarce; June 13. 

 Near New York City, many records; West Poi nt to Anglesea; 

 June Aug. Ranges from Massachusetts to Michigan and Kan- 

 sas, south to Florida and Texas. Breeds in the seed pods of 

 several species of milkweed (Aselepias}. 



757 ( ). RHYSSEMATUS ANNECTANS Casey, 1895, 834. 



Narrowly oval. Black, feebly shining; antennae and tarsi pale reddish- 

 brown, club dusky. Head thickly clothed with yellowish hairs, finely and 

 densely punctate. Beak about as long as head and thorax, nearly straight, 

 sculptured as in lineaticollis ; antennas inserted at apical third. Thorax 

 about twice as wide as long, sculptured as described in key. Elytra oblong- 

 oval, almost one-fourth wider at base and about three times as long as tho- 

 rax; strial punctures large, quadrate, alternate intervals strongly carinate. 

 Under surface more finely and densely punctate than in the preceding. 

 Length 4.8 5 mm. 



Lake and Vigo counties, Ind., scarce; May 29 30. Taken 

 beneath cover in sand. Chicago, 111., July 20. Known only from 

 Ohio, Indiana and Illinois. Recorded by Dury as abundant on 

 and eating out the heads of swamp milkweed, Aselepias inear- 

 nata L., May 24. Close to but probably distinct from lineaticollis, 

 especially in its more narrow form and oblique thoracic strigte. 



758 (8743). RHYSSEMATUS ^QUALIS Horn, 1873, 464. 



Oblong-oval, robust. Black, feebly shining; antenna? and tarsi reddish- 

 brown. Beak sparsely punctured in front, basal half striate-punctate, not 

 carinate. Thorax at base one-third wider than long, sides curved, feebly 

 constricted near apex, disc with fine oblique strigas, a few punctures along 

 apical and basal margins. Elytra oval, feebly narrowed at apex, disc with 

 rows of coarse, deep, elongate punctures; intervals nearly flat, each with 

 two irregular rows of very fine punctures bearing minute yellowish bristles. 

 Beneath coarsely, abdomen very densely and more finely punctured. Length 

 3.3 4 mm. 



