OF WASHINGTON, VOLUME XIV, 1912. 



121 



differs from Phorocera claripennis Macq., which it closely 

 resembles in appearance, as follows : 



P. einaris. 



Bend of fourth vein not distinctly 

 long appendiculate. Scutellum 

 bearing a strong pair of discal 

 macrochaetae. 



Middle tibiae each bearing two 

 macrochaetae on the front side 

 near the middle. 



Two sternopleural macrochaetse. 

 Arista thickened on the basal 

 fifth to one-fourth. 



P. claripennis. 



Bend of fourth vein distinctly long 

 appendiculate. Scutellum usually 

 not bearing a pair of discal 

 macrochaetae. 



Middle tibiae each usually bearing 

 three macrochaetae on the front 

 side near the middle. 



Three sternopleural macrochaetae. 

 Artista usually thickened on the 

 basal half. 



Described from 5 males and 4 females collected at Melrose 

 Highlands, Massachusetts, August 1 to September 20, 1911, 

 by the author and F. H. Mosher; 1 female from Lynn, Mas- 

 sachusetts, August 29, collected by F. W. Lowe; 1 female 

 from New Haven, Connecticut, collected by W. E. Britton, 

 August 14, 1906; and 1 female from Tampico, Mexico, taken 

 by E. A. Schwarz. 



Type: No. 14697, U. S. National Museum. 



Phorcera incrassatus, new species. 



Thorax and abdomen black, polished; scutellum brownish yellow on 

 the apical two-thirds; legs brownish black, all thinly dusted gray pollinose; 

 palpi yellow. 



Length, 7 mm. 



Head nearly one and one-half times as broad as long; front as wide as 

 either eye; paraf rentals, parafacials, and the cheeks yellowish-gray polli- 

 nose; frontal bristles descending to a point opposite the arista; outside 

 of the frontal row a pair of proclinate orbital bristles and a number of 

 black bristles and bristly hairs; frontalia opaque brown; antennae black, 

 dusted with whitish pollen, descending nearly to the oral margin, the 

 third joint at least three and one-half times as long as the second; arista 

 one and one-fourth times as long as the third antennal joint, thickened on 

 the basal half, the penultimate joint only slightly longer than broad; 

 vibrissse on a level with the front edge of the oral margin; facial ridges 

 ciliate on the lower half; sides of face each one-fifth as wide as the median 

 depression; width of cheeks equal to about one-fifth the eye height ; checks 

 caudad of the vibrissae, each bearing a row of strong bristles near the oral 

 margin, the remainder bearing many black bristly hairs; palpi about as 

 long as the proboscis. 



Mesonotum black, polished, dusted yellowish-gray pollinose, distinctly 

 vittate; four pairs of postsutural and three pairs of postacrostichal 



