48 PROCEEDINGS OF THE NATIONAL MUSEUM. vol, 63. 



29. Parafacial at uarrowest wider than the rather narrow third antennal 



joint (compare reinhardi, new species) silvatica, new species. 



Parafacial at narrowest about equal to the decidedly widened third an- 

 tennal .ioint slossonae Townsend. 



Parafacial at narrowest only half the width of the third antennal Joint, 



which is of ordinary form tenuiseta, new species. 



30. Parafacial at narrow'est wider than third antennal joint 31 



Parafacial at narrowest narrower than third antennal joint 32 



31. Front unuj-nially broad, the vertex of tlie male 0.38, of the female 0.37 



to 0.43 of the head width setifrons, new species. 



Front of ordinary width, vertex of male 0.22, of female 0.34 the head 

 width ; third antennal joint broadly red at base silvatica, new species. 



32. Male with dense and striking brush of long black hairs on base of inner 



forceps pluriseriata, new species. 



Male with only a few scattering long hairs on base of iinier forceps. 



fusicimacula, new species. 



33. Three posterior dorsocentral bristles 38 



Four iX)sterior dorsocentral bristles ... 34 



.S4. Sides of fronr with numei-oua bristles outside the frontal row ; first and 



second and at least the base of the third antennal joint reddi.sh 37 



Sides of front outside the frontals without bristles 35 



35. Fourth abdominal segment densely deep yellow pollinose, contrasting 



strongly with the two preceding segments signata, new species. 



Fourth abdominal segment with pollen of same color as on preceding 

 .segments 36 



36. Intermediate abdominal segments each with two pairs of diseal niacro- 



chaetae incrassata Smith. 



Intermediate abdominal segments each with but a single pair of diseal 

 raacrochaetae festinans, new species. 



37. .\bdomen black, the last three segments gray pollinose on the bas>al three- 



quarter.s, in striking contrast to the black apices, with a definite line 



of demarcation comstocki Willistou. 



Abdomen black, thickly covered with gray pollen, with no distinct pat- 

 tern ; anal segment wholly gray pollinose texana, new species. 



38. Three sternopleural bristles 39 



Two sternopleural bristles levis, new species 



39. Sides of front outside the frontal bristles destitute of long hairs ; anal 



segment yellowish pollinose ; mid tibiae with one long bristle on the 



outer front side near the middle leucaniae Coquillett 



Sides of front outside of the frontal bristles bearing long hairs. 



fulviceps Van der Wulp. 



Subgenus Phorocera. 



PHOROCERA SLOSSONAE Townsend. 



fPhorocera citurca Van der Wulp, Biologia, Dipt., vol. 2, 1890, p. 81. 

 Euphorocera clncrea Coquifxett, Bull. 7, Tech. ser., Div. Ent., 1897, p. 102. 

 Phorocera slossonae Townsend, Smiths. Misc. Colls., vol. 51, No. 1803, 

 1908, p. 108. new name, for Co(}uilIett's specimen, believed misidentified. 



Male. — Front rather wide, light gray pollinose, the frontal stripe 

 broad, the single row of bristles diverging below and extending as 

 far as the arista; ocellar bristles normal, parafacials rather wide, 

 the facial ridges with bristles almost to the level of the frontals; 



