22 PROCEEDINGS OF THE NATIONAL. MUSEUM vol.77 



It is strongly bilobed with two long bristles at the middle of the 

 emargination. The palpi are attached on the diagonal sides of the 

 labium, and three jointed, the first and third subequal, the second 

 shortest; joints dark brown, but yellow at apex, second joint with 

 several very long bristles on inner side ; third joint with a few shorter 

 bristles. The hypopharynx or inner surface of labrum and ligula 

 has two series of blunt crowded bristles separated from each other 

 by the raised median line. 



Thus the interior of the mouth is a network of bristles from all 

 directions. 



This genus differs from Discotenes by having the lobes of the 

 ligula much stronger. 



Figures 59 and 60 illustrate the wing structure. 



Platystominae, new subfamily 



TABLE OP NORTH AMERICAN TRIBES OF PLATYSTOMINAE 



Beak with sides parallel or almost so. Body oblong or oval; rostral scrobes 



foveiform Platystomini, new tribe. 



Beak very short, narrower in front, trapezoidal ; scrobes sulciform. 



Brachytarsini, new tribe. 



PLATYSTOMINI, NEW TRIBE 

 Platyrrhini Bedel 1885. 



TABLE OF NORTH AMERICAN GENERA OF PLATYSTOMINI 



1. Tarsi with third joint wider, deeply bilobed, visible from above 2. 



Tarsi with third joint bilobed, not visible from above 7. 



2. Hind angles of prothorax not directed outward 3. 



Hind angles of prothorax directed outward; front coxae contiguous 6. 



3. Front coxae contiguous or nearly so 4. 



Front coxae well separated by the prosternum 5- 



4. Claws almost cleft, body elongate-cylindrical, eyes emarginate. 



Phoenicobiella Cockerell. 

 Claws feebly appendiculate, body stout subcylindrical, eyes oval. 



Piesocorynus Dejean. 



5. Eyes rounded Pseudanthribus, new genus. 



Eyes broadly emarginate Toxonotus Lacordaire. 



Eyes with a short, shallow emargination Platystomos (Helling) Schneider. 



6. Eyes emarginate Eusphyrus LeConte. 



7. Mandibles with a tooth on the ventral edge Euparius Schonherr. 



Genus PHOENICOBIELLA Cockerell 



PhoenicoUus LeContb, Proc. Amer. Philos. Soc, 1876, vol. 15, p. 401. Type, 



chamaeropis LeConte (not Morch 1852). 

 PhoemcoUella Cockerell, Ent. News, 1906, vol. 17, p. 243. 



TABLE OF SPECIES OF PHOENICOBIELLA 



Species dark brown, tessellated with black and yellowish__chamaeropis LeConte. 

 Species very light yellowish brown, with slightly darker tessellations. 



schwarzi Schaeffer. 



