268 CUKCULIONID^E. [LeConte. 



by a thickened margin. The eyes are partially covered when the head is 

 deflexed, and the beak, which is long and cylindrical, rests in a deep 

 groove extending through the pro- and mesosternum, into the metaster- 

 num, where it is sharply limited. The side pieces of the meso- and meta- 

 sternimi are very large. The ventral sutures are curved at the 

 sides ; the first segment is as long as the metasternum, the second is shorter, 

 third and fourth together equal to the second; fifth nearly as long as the 

 first, truncate and impressed in the male. Legs slender, thighs slightly 

 clubbed, tibiae obliquely fringed at the tip, terminal hook very small at the 

 inner angle. Tarsi with the third joint very broad, bilobed; fourth joint 

 small, with a single claw. 



MONONYCHUS Germ. 



The genus is sufficiently defined by the characters of the group. One 

 species occurs in our fauna ; otherwise it is represented by six species in 

 Europe, Northern Asia, and one in the Canary Islands. 



1. M. vulpeculus Boh., Sch. Cure, iv, 309; Ithynchcenus vulp. Fabr., 

 Syst. El. ii, 450; Oliv., Ent. v, No. 83, 129, pi. 29, f. 437; Say, Cure. 20; 

 ed. Lee. i, 286 (habits) . 



Canada to Georgia, on Iris. Say states that it also occurs on the flowers 

 of Geanothus americanus, and Verbascum thapsus in July. 



Group II. Coeliocles. 



In the species of this group the eyes are partially covered by postocular 

 lobes, when the head is deflexed, and the pectoral groove extends into or 

 beyond the mesosternum, the beak is long and cylindrical. The side pieces 

 of the meso- and metasternum are large and wide. The ventral sutures 

 are curved, and the first is as deeply impressed as the others; the second 

 segment is shorter than the first; third and fourth still shorter, fifth nearly 

 us long as the first. The pygidium is perpendicularly deflexed, marked 

 with an elevated angulated line for the reception of the tips of the elytra, 

 in front of which it is carinated. The third joint of the tarsi is very broad 

 and bilobed, the fourth is as long as the first, with two claws, which are 

 cleft, or toothed. 



The following genera are represented in our fauna: 



Tibiae flattened, toothed on the outer side 2. 



" slender, not dilated nor grooved 3. 



2. Pectoral groove extending to the metasternum. . . . CRAPONIUS. 



" not extending to the metasternum CNEMOGrONUS. 



3. Body broadly ovate, elytra suddenly wider CCELIODES. 



" pyriform, elytra gradually wider ACALLODES. 



CRAPONIUS n. g. 



A single species which differs remarkably from Cc&liodes by the tibiae 

 being flattened, dilated, angulated 011 the outer margin near the base, and 

 broadly grooved externally for the partial reception of the tarsi. It has, in 



