E. T. CRESSON, JR. 
343 
apical bristles. Pleura except iiiesopleura polished. Abdomen polished, 
with slight greenish tinge; lateral margins revolute. Femora polished; fore 
pair finely ciliate beneath. Length. — 3 to 3.5 mm. 
Type . — ct’; Baranqiiilla, Department of Atlantico, Col()m])ia, 
March, 1912, (Ujhelyi), [Hungarian National Aluseuni Collec- 
tion]. 
Eight additional specimens have Ijeen examined, all from 
Paraguay: San Bernardino, February to March, IBarbarczy), 
and Puerto iMax, January to April, (Vezenui), [all Hung. Nat. 
Miis.j 
The specimens from Paraguay are, apparently, not in anyway 
different from the type. It is difficult to determine the sexes 
in this species. The type, however, seems to l)e a male. 
EXPLANATION OF PLATE XX 
Fig. 1.- — Gymnopa tibialis Cresson. Profile of hc:id. (X 45) 
Fig. 2. — Athyroglossa glabra (Meigen). Profile of hc;id. (X 45) 
Fig. 3. — Ochtheroidca. atra Williston. Profile of head. (X 50) 
Fig. 4. — Gymnopa tibialis Cresson. Wing. (X 25) 
Fig. 5. — Gymnopa tibialis Cresson. Fore femur. (X 45) 
Fig. 6. — Ochtheroidea mclanderi new species. Fore femur. (X45) 
Fig. 7. — Ochtheroidca similis Cresson. Fore femur. (X45) 
Fig. 8. — Ochtheroidca glaphyropus (Loew). Prohle of liead. (X45) 
Fig. 9. — Ochtheroidea mclanderi new species. Profile of head. (X 45) 
Fig. 10. — Ochtheriodea, fascipennis Cresson. Wing. (X 30) 
Fig. 1 l.—Oc/d/ie?'iodca aCa Williston. Wing. (X 30) 
Fig. 12. — Ochtheroidca atra Williston. Fore femur. (X 45) 
TK.\N.S. AM. ENT. SOC'., XLVIl. 
