TRIBE XX. CEUTORHYNCHIXI. 



427 



Subtribe II. CCELTODES. 



Species of small size having the eyes in repose more or less 

 covered by postocular lobes; beak cylindrical, slender, received 

 in a groove which extends back at least as far as the mesoster- 

 num; legs long and slender, femora stout, usually more or less 

 grooved on the outer side to receive the tibire in repose; third 

 joint of tarsi broadly bilobed, fourth with two claws which are 

 cleft or toothed. Eight genera were recognized by Dietz, all of 

 which are represented in our territory. Ccelogaster of the sub- 

 tribe Phytobii possesses many of the characters of this tribe. 



Fig. 99. Structures of Ceutorhynchini. a, Front tibia 

 of Cncmogonus; b, hind tibia of Acantlwscelis citrtits; c, 

 front tibia of Aulcutcs cruraiis; d, antenna of Ccutorhyn- 

 clnis oT'alis; c, same of Pclenomus sulcicollis; f. tarsus of 

 Phytobius. (After Dietz.) 



KEY TO GENEKA OI' 1 SUBTRIEE CCELIODES. 



Femora not toothed, grooved beneath for the reception of the tibiae; 

 second ventral segment shorter at the middle than the next two 

 united, prolonged backward at sides so that its posterior lateral 

 angle reaches the fourth segment, cutting off the third, which often 

 fails to reach the margin. 

 >. Tibiae flattened, toothed or angulated on the outer sides near the 



base. (Fig 99, o.) 



c. Pectoral groove extending onto the metasternum; thorax with 

 four large tubercles. II. CRAPONIUS. 



cc. Pectoral groove not reaching onto the metasternum; thorax with 

 two obtuse tubercles. III. CNEMOGONUS. 



b. Tibiae not flattened nor dentate near the base. 

 cl. Outer, apical angle of front tibiae prolonged in a toothed process. 



IV. ACANTHOSCELIS. 



dd. Outer angle of front tibiae not produced. (Fig. 99, c.) 

 e. Hind femora not conspicuously dilated. 



/. Elytra without crests of erect scales. V. AULEUTES. 



ff. Surface of elytra very uneven, with crests of erect scales. 



VI. PELENOSOMTJS. 



ee. Hind femora strongly dilated. VII. HYPOCCELTODES. 



Femora toothed beneath, not grooved for the reception of the tibise 

 in repose; second ventral longer at the middle than the third and 

 fourth united, not prolonged at sides. 



