sent me $ 9 originally as such and Mr. Rivers has succeeded in ob- 

 taining and mating freshly hatched specimens. This species is rare in 

 collections partly from its being frequently confused with C.planifron* 

 from which it may be easily known by the frontal carina and by the 

 pubescence at the scutellum. In phnifrons the sen tell urn only is cov- 

 ered with yellow pubescence, while vaobliteratus the base ofthe elytra also 

 is densely clothed for some distance on each side. 



X. sagittatus Germ. Mag. Knt. IV, 1821, p. 171; Lap and Gory Mon. p. 82. 

 t. 15, f. 95; I-ec. J. A. P. ser. 2, II, p. 177; pubescens I laid. Trans. Am. Phil. X, 

 l>. 40'. Lee. I. c. p. 28; Dej. Cat. 3 ed. p. 356. 



Length 15-18 mm. =.60-. 72 ins. Hah. Florida, Georgia, Pennsylvania, Mich 

 igan, Mass. Ariz. 



Brownish, above and beneath with more or less white pubescence 

 and indistinct bands. The spines of elytral tip though short are dis- 

 tinct and more marked than in any other species. 



X. mormonus Lee. Proc. A.c. Phil. 1861, p. 357. 

 Length 15-17mm.ss.60-.68 ins. Ilab. Utah, Wis. 



1 have seen but one specimen in Dr. Horn's collection correspond 

 ing exactly with Dr. Leconte's description as under. 



"Black, sparsely cinereo-pubescent, head rough marked with two 

 "frontal carinas thorax oval, wider than long, convex, rough, elytra feebly 

 "punctured and rugose, separately rounded at apex, with several small 

 "pubescent spots in middle fascia and another at two-thirds the length 

 "denuded, posterior femora a little shorter than the abdomen." 



X. colonus Fabr. Syst. Ent. p. 91; Oliv. Ent. IV, 70, p. 31, t. 6, f. 67; Sch 

 onh. Dej. Cat. 3, ed. p. 356; Lee. J. A. P. ser. 2, II, p. 28; campestris Oliv. 1. c. 

 p. 65, t. 8. f. 95; Lee. 1. c. p. 27; coloreus Fabr. -Syst. EI. II, p. 345, (err. typ.); sea - 

 lyricollis Mergerle, i. litt. ; terminans Fabr. Ent. Syst. Suppl. p. 151; Lap and Gory 

 Mon. p. 83, t. 15 f. 96; villicus Oliv. 1. c p. 64, t. 8. f. 94. 



Lengtli, 8-16 mm. =.32--. 64 ins. Hab. U. S. east of Rocky Mountains. 



Black or brown pubescent above and beneath with lighter hair. The 

 markings are very variable bui the yellow wavy line running from suture 

 and forming the included mark seems to be constant and peculiar to the 

 species. 



X. undulatus Say. Long's Exped. II. 1820, p. 291, Am. Ent. III. 1828, t. 53: 

 Lap and Gory Mon. p. 57, t. 11, f. 66; Lee. J. A. P. ser. 2. II. p. 27; undatus Kirby 

 Vn. Bor. Am. IV. p. 175, t. 7, f. 5, integer Hald. Trans. Am. Phil. X, p. 41; Ivmt 

 lotus Kirby 1. C. p. 175, Hald. 1. c. Sayi Lap and Gory Mon. p. 55, t. 11, f. 64, 

 Hald. Proc. Am. Phil. Soc. IV, p. 372, var. fuscus Kirby 1. c. p. 176. Lee. I.e. 

 nor. interruptus Lap and Gory 1. c. f. 67. 



Length 11--21 mm. =.44-. 84 ins. Hab. U. S. 



(To be Continued. 



