277 



cunctans with other members of the group, as ultima Alexander 

 and tennessa Alexander. 



Tricyphona johnsoni, sp. nov. 



Entirely similar and closely related to T. inconstans (Osten Sack en), differing 

 most conspicuously in the structure of the ninth tergite of the male hypopy- 

 gium. 



Wings narrower than in inconstans. Venation: Rs long-spurred at origin; 

 radial field with adventitious crossveins, chiefly arranged in cell Ri where they 

 vary in number from one to seven. Ninth tergite of the male hypopygium 

 narrowed outwardly, the caudal end conspicuously narrower than the base, 

 the margin gently concave. In inconstans, the caudal margin of the tergite 

 is more deeply concave and produced into small sublateral lobes, with a smaller 

 lateral incision on either side, the margin of the tergite fringed with delicate 

 setae. 



Habitat. — Massachusetts. 



Holotype.— Male, Nantucket Is., June 22, 1927 (C. W. Johnson). 



Paratopotypes. — Numerous specimens, June 25, 1926; June 7-22, 1927 (C. 

 W. Johnson). 



Type. — In the collection of the Boston Society of Natural History. 



Trichyphona johnsoni is named in honor of the collector of the 

 type-series, my friend, Charles W. Johnson, to whom we owe 

 our greatest advance in knowledge of the Diptera of New Eng- 

 land. Although very similar and closely allied to T. inconstans, 

 I have no doubt of the distinctness of the present form. The 

 nature of the venation in the type-series of more then thirty 

 specimens has been discussed in detail by Mr. Johnson (Psyche 

 34: 216-217, 4 figs., 1927). 



Erioptera (Erioptera) uliginosa, sp. nov. 



General coloration dull brown; knobs of halteres darkened; wings with a 

 strong brown suffusion, more saturated in the costal and stigmal regions; 

 male hypopygium with the outer dististyle elongate, expanded at apex into 

 an oval blade; inner dististyle much smaller, simple, narrowed to a point. 



Male. — Length about 4.5-4.8 mm.; wing 4.5-5.3 mm. 



Female. — Length about 5 mm.; wing 5.3-5.5 mm. 



Rostrum and palpi black. Antennae dark brown throughout. Head of 

 male large; eyes very large, separated above, protuberant and contiguous 

 beneath; in female, head and eyes smaller. Head dull brown, the orbits 

 brighter. 



Mesonotum opaque dark brown, the praescutum almost covered by three 

 more reddish brown stripes, the dorsum in cases more uniformly brown. 

 Pleura gray. Halteres brownish yellow, the knobs brown. Legs with the 

 coxae brownish gray; trochanters obscure yellow; remainder of legs brown, the 

 femoral bases more brightened. Wings with a strong brown suffusion, more 

 saturated in the costal and stigmal regions; veins brown. Venation: Rs 



