18 



PROCEEDINGS OF THE NATIONAL MUSEUM 



VOL. 78 



Carolimyia, new subgenus 



This subgenus is distinguished readily from the others by the char- 

 acters listed in the foregoing key. Both of the species which I place 

 herein lack the occipital and mesopleural bristles, and have the 

 scutellum with fine hairs and but two apical marginal bristles. The 

 venation is much as in Plagiostenopterlna^ but the inner cross vein is 

 almost erect and the central basal streak of black color is missing. 



Genotype. — Carolimyia diptera, new species. 



The two species accepted as belonging to the subgenus may be 

 separated as below. 



A \ Apical ventral spur of mid tibia blunt tipped ; coxae, femora, and antennae, 

 testaceous yellow ; apes of wing in both sexes with a dark -brown mark 



from before level of outer cross vein 

 —-'^-.^ to tip, in which there are some wedge- 



~>i^. shaped pale marks (fig. 6) 



diptera, new speciea 



FiGDEE G.^ — Wings of Plagiosten- 



OPTERINA DIPTERA, a, FEMALE. 

 &, MALB 



Figure 7. — Wing of Plagiostbnop- 

 teeina flag i ata 



A *. Apical ventral spur of mid tibia sharp tipped ; legs and antennae fuscous, 

 femora with metallic blue tinge ; apex of wing with a fuscous cloud well 

 beyond the level of outer cross vein in which there is one hyaline 

 wedge-shaped incision in hind margin (fig. 7) plagiata (Bezzi). 



CAROLIMYIA DIPTERA, new species 



Male and female. — Head shining black, upper half of face testa- 

 ceous yellow, parafacials, frontal orbits, and cheeks with white dust, 

 the antennal foveae and pale upper portion of face yellowish dusted, 

 occiput except the flattened upper third with dense silvery white 

 dust; antennae testaceous yellow; aristae yellow at bases, black at 

 apices; palpi fuscous; proboscis glossy black below. Thorax and 

 abdomen metallic blue, mesonotum duller than the dorsum oi abdo- 

 men because of the more numerous piliferous punctures; pleura with 

 three vertical stripes of dense yellowish dust, one on propleura, the 

 second over sternopleura, and the third on posterior portion of hypo- 

 pleura and anterior portion of postnotum; the abdomen without dust, 

 black haired. Legs testaceous yellow, tibiae blackish brown, tarsi 

 black. Wings hyaline, with blackish-brown marks as in Figure 6. 

 Calyptrae whitish gray. Halteres yellow. 



Frons longer than wide, slightly wider in male, orbits very narrow, 

 ocellars not developed; verticals four; antennae extending to about 



