173 



T. parshleyi Alex. Stream, June 15. 



T. senega Alex. Woods, June 12-20. 



T. strepens Lw. Stream, June 13-15. 



T. submaculata Lw. Stream and woods, June 22- July 1. 



T. tephrocephala Lw. Stream and woods, June 13-26. 



T. trivittata Say. Woods, June 12-30. 



T. valida Lw. Woods, June 12-20. 



Description of New Species. 

 Dicranomyia profunda, sp. n. 



General coloration yellow to yellowish brown; antennae dark throughout; 

 halteres short; tips of femora narrowly infuscated; wings with a yellow tinge, 

 the radial cells more infumed; vein Sci long. 



Male. — Length about 5.5 mm.; wing 6.5 mm. 



Female. — Length about 6.5 mm.; wing 7.2-7.4 mm. 



Rostrum and palpi brown. Antennae short, dark brown, the extreme base 

 of the first segment a trifle paler ; flagellar segments short-oval. Head brownish 

 gray; vertex (male) between eyes a little wider than the first scapal segment. 



Pronotum and mesonotum yellowish testaceous to light yellowish brown, the 

 surface with a yellow pollen, lighter colored in the female. Pleura concolorous. 

 Halteres short, pale, the knobs a trifle darker. Legs with the coxae and tro- 

 chanters yellowish; femora yellow, the tips narrowly but conspicuously dark 

 brown; tibiae yellowish testaceous, the tips narrowly and indistinctly darker; 

 tarsal segments brownish yellow, narrowly tipped with dark brown, the ter- 

 minal segments uniformly dark brown. Wings with a strong yellowish tinge, 

 the costal region more saturated; stigma oval, only slightly more brownish 

 than the ground-color, the two ends darker than the middle; wing-apex in outer 

 ends of radial cells distinctly darkened ; in some specimens a spot at origin of Rs 

 and narrow seams along cord and outer end of cell 1st M^ infumed; veins darker 

 than the ground-color. Venation : Sc short, Sc\ ending opposite or a short dis- 

 tance before the origin of Rs, Sci some distance from its tip, in some cases not 

 evident; Sc-i alone approximately one-half the length of Rs; cell 1st M^ relatively 

 elongate, longer than vein M4 beyond it ; m-cu at fork of M. 



Abdominal tergites brown, the sternites more yellowish, especially the basal 

 segments. Male hypopygium with the median area of the ninth tergite with- 

 out setae. Basistyle with the mesal lobe very large and fleshy. Ventral dis- 

 tistyle large and fleshy, two to three times the size of basistyle; rostrum short 

 with two nearly basal spines, these short, stout, straight, their tips acute, 

 placed close together, the rostrum beyond them shorter than the length of a 

 single spine. Dorsal dististyle a strongly curved sickle-shaped hook, gradually 

 narrowed to the apex which is narrowly rounded. Mesal lobe of gonapophyses 

 conspicuous. Ovipositor with the tergal valves slender, only gently upcurved. 



Habitat. — Massachusetts, Maine. 



Holotype, male, Lake May, Berkshire Co., Massachusetts, altitude 1500 feet, 

 June 30, 1925 (Alexander). Allotopotype, female, June 20, 1925. Paratype, 

 female, Ellsworth, Hancock Co., Maine, July 30, 1913 (C. J, Stanwood). 



By existing keys, the present species would run to Dicranomyia 

 gracilis Doane, a very different fly. Dicranomyia profunda is 

 told by the narrowly dark-tipped femora and the distinct clouding 

 in the apices of the radial cells of the wings. 



Dicranomyia sphagnicola, sp. n. 



General coloration brown, the rostrum and antennae black; halteres elongate; 

 wings with a faint brown tinge, the stigma only a little darker; Sci long; male 

 hypopygmm complicated in structure, spines of the ventral dististyle placed 

 beyond midlength of the rostriform appendage. 



Male. — Length about 4.5 mm. ; wing 5.5 mm. 



Female. — Length about 6 mm.; wing 6.5 mm. 



