454 Sn-.FAMIIV X. 



Subtribe TV. 



Stout robust species of medium size, having the beak short and 

 stout, its antennal grooves usually oblique, directed beneath the 

 eyes; pectoral groove either wanting or not reaching the front 

 coxa?; eyes, except in Ccrlofjastcr, not concealed in repose; funicle 

 6-jointed, except in Rlilnoncux. The species of the last TAVO 

 genera are notable for their velvet-like vestiture. 



KEY TO GENERA OF SUBTRIBE PHYTOBTI. 



a. Eyes in repose completely concealed by prominent thoracic lobes; 

 beak as long as thorax, its antennal grooves directed against the 

 eyes. XI. CCELOUASTER. 



aa. Eyes feebly or not at all concealed in repose, the postocular lobes 

 small or obsolete; beak shorter than thorax, its grooves oblique, 

 directed beneath the eyes. 



b. Third tarsal joint bilobed, fourth joint shorter than the two pre- 

 ceding united. 



c. Second ventral segment not longer at middle than the third and 

 fourth combined, third narrowed at each end; front coxae 

 widely separated; form broadly oval. XII. PERIGASTER. 



cc. Second ventral segment longer at middle than the two following 

 united, third not narrowed on the ends; front coxae narrowly 

 separated. 



d. Prosternum without antecoxal ridges. XIII. PELEXOMTS. 



dd. Prosternum with acute antecoxal ridges. 



e. Funicle 6-jointed; eyes with distinct supra-orbital ridges; 



front coxae separated one-third the distance of the middle 



coxae. XIV. MECOPEI/TUS. 



ee. Funicle 7-jointed; eyes without supra-orbital ridges; front 



coxae separated one-half the distance of the middle coxse 



XV. Rmxoxors. 



l>l). Third joint of tarsi narrow, not or scarcely bilobed, fourth as 

 long as the preceding joints united (Fig. 99, /); form elongate- 

 oval; lateral tubercles of thorax almost obsolete. 



/. Base of thorax not prolonged backwards. XVI. PEREXTHTS. 



ff. Base of thorax prolonged backward with acute triangular process. 



XVII. PHYTOBIUS. 



XT. rKi,o<;ASTKU* Schon., 1837. (Gr., "large" + "belly.") 



Beak moderately stout, as long, male, or a little longer, fe- 

 male, than thorax; pectoral canal deep, not extending on ineso- 

 sternum ; second ventral shorter than the third and fourth united, 

 Third narrowed at each end; cox;o widely separated; femora not 



'Champion (1907, 151) has proposed the name Dictzclla for this genus, claiming 

 that American species are not true Ccelogasters, but further study of European species 

 is required hefore adopting the change. If the change is made Dictzclla should probably 

 be referred to the subtribe Cccliodes. 



