1856.] 29 



31. C. obsoletus, Lee. Anu. Lye. 5, 180, is certainly closely allied to the 

 preceding, but the thorax is hardly wider than long, and is more narrowed be- 

 hind ; the feet, palpi and antennae are rufous, the latter being darker externally 

 as is usual. 



32. C. circumcinctus Say^ Trans. Am. Phil. Soc. 4, 418; C. virens 

 Chaud. Bull. Mosc. 1843. 



34. 0. impunctifrons Sai/, Trans. Am. Phil. Soc. 2, 64 ; C. emarginatus 

 Kirby, Fauna Bor. Am. 4, 23. 



35. C. n i g e r Randall, Bost. Journ. Nat. Hist. 2, 34 ; C. exaraius Ferte, Ann. 

 But. Soc. Fr. 2nd ser. 9, 249. 



37. C. tomentosus Dej. Sp. Gen. 2, 357 ; Epomis tomentosus Say, Trans. 

 Am. Phil. Soc. 2, 60 ; Amara luciuosa Germ. Sp. Nov. 10. On this species M. La 

 Ferte has founded a genus Eurydactylus, which differs from Chlaenius, only in 

 the dilated joints of the anterior tarsi of the male being broader. I do not find 

 in this character an exact agreement between our different species, and, although 

 I have adopted the genus in my memoir in the Trans. Am. Phil. Soc. (10, 390,) 

 I now unite in the opinion of Lacordaire, Gen. Col. (1, 224) that it is entirely un- 

 necessary. Say mentions a green variety from Missouri. 



38. C. a m p 1 u s. I have separated under this name a species having the color 

 and sculpture of C. tomentosus, but very different in the form of the thorax, 

 which instead of being gradually rounded on the sides from the base to the apex, 

 has the sides almost parallel near the base, and very much rounded before the 

 middle. It is found in Georgia, and I have examined two specimens of which 

 one is in the collection of Dr. Harris. 



Synopsis of Species o/Chrysomela and allied Genera inhabiting the United States. 



By W. Frederick Rogers. 



The Genera in the United States may be thus classified : 



Ungues fissi ; femora postica incrassata ; Blepharida. 



Ungues integri, vel vix dentati; femora baud incrassata ; 



Palpi articulo ultimo breviore truncato Doryphora. 



(Polygramma, Labidomera). 



Palpi articulo ultimo hand breviore ; 



Tarsi articulo 2ndo baud angustiore Timarcha. 



Tarsi articulo 2ndo minore Chrysomela. 



BliEPHARIDA. 



Maxillary palpi with the last joint cylindrical and obtusely pointed at the ex- 

 tremity. Posterior femora moderately thickened. Middle and posterior tibife 

 with an obtuse angle on the exterior margin one-third from the tip. Ungues bi- 

 fid. Anterior coxae moderately distant. Prosternum flat. Mesosternum hardly 

 protuberant. Middle coxae widely separated. 



B. r h o i s . Oval, convex, ferruginous ; head and thorax yellow ; elytra 

 with eleven rows of large punctiares, irregularly mottled sometimes vittate with 

 yellow and ferruginous ; margin always broadly yellow ; antennae black, base 

 piceous. Length -25 -30. 



Chrysomela rhois Forst. Cent. Ins. 1, 21. Hiibn. Naturf. 24, St. 40. Oliv. Enc. 

 Meth. 5, 720. 



Altica virginica Frolich, Naturf. 26, 129, 54. 



Hallica rhois Ulig. Mag. 6, 161. 



Chrysomela stolida Fabr. Ent. Syst. 1, 318. Syst. El. 1, 435. Oliv. Enc. Meth. 

 5, 700. 



ITaltica stolida lUig. Mag. 6, 161. 



Chrysomela meticulosa Oliv. Ins. 91, 531, tab. 6, fig. 91. 



