52 PROCEj;i)IXGS OF THE NATIONAL MUSEUM. vol. 63. 



12. Tlie united inner forceps provided with dense, even, erect, short hair on 

 the back to the very tip, wliidi is blunted nnd bent bacli. 



imitator, new species. 



The united inner forceps short and bent forward at tip 13 



lo. The united inner forceps foruiinf? a curved tip lilje a cuclioo's bealc. the 

 base with a ri<ise on eacli side and a dense mass of short yellow hair 



in the inclo.sed groove coccyx, new species. 



The united inner forceps not with such structure 14 



14. The united inner forceps straiglit almost to the tip, deeply grooved be- 

 hind near the tip sulcata, new species. 



The united inner forceps strongly curved forward from about the 



middle virilis, new species. 



Alba Townsend is known only from the female and can be traced only 

 to couplet 12 in this table. Indivisa, although the male is not kno\\'n, 

 appears to run satisfactorily to its place in couplet 6. 



PHOROCERA VIRILIS, new species. 



Male. — Front 0.29 of the. headwidth; pollen of head rather uni- 

 form pale golden-yellow; frontal bristles about 10 in number, the 

 two uppermost moderately strong and reclinate, those below much 

 smaller except the lower ones, the row extending slightly below the 

 arista; parafrontals rather densely covered wnth short, black hairs; 

 antennae black, the third joint hardly four times the second, rather 

 wide at apex; the arista slender, much longer than the third joint, 

 its penultimate joint distinct but short; facial ridges with stout 

 bristles reaching to the level of the arista ; paraf acials at narrowest 

 about one-half the width of the third antennal joint; palpi yellow 

 on the apical half, blackish basally ; proboscis small ; bucca about one- 

 sixth the eye-height; back of head with dense whitish beard. 

 Thorax yellowish cinereous, the four usual dorsal stripes narrow, 

 when viewed from behind, and a median one somewhat distinct 

 which reaches to the scutellum; posterior doi*socentrals 4; anterior 

 dorsocentrals 3 ; sternopleurals 3 ; scutellum with three lateral pairs 

 of bristles and an apical decussate pair, about as large as the middle 

 lateral; also with a distinct pair of disrals of about the same size. 

 Abdomen with yellowish pollen on the basal part of segments two. 

 three, and four, which extends underneath but changes to white in 

 that region; the first and second segments with only a small pair 

 of median marginals on each, the third with a very stout row ; when 

 viewed from behind, there is a median, dark stripe which is fusiform 

 on the second segment, very narrow on the third and wide on the 

 fourth, where it blends with the apical, shining half ; the second and 

 third segments have about the posterior half shining but vary in 

 different angles of view. Genitalia small, brownish-black; thft 

 united inner forceps narrowing to a beak, which is strongly curved 

 forward; the outer forceps flat, broadly rounded toward the apex, 

 where they are as wide as near the base, considerably shorter than 



