116 



Family Tipulidae. 

 Subfamily Limoniinae. 

 Ormosia notmani Alexander. 

 Ormosia notmani Alexander, Canadian Ent., vol. 52, p. 225, 1920. 



This crane-fly was described from a single specimen taken at 

 Keene Valley, Essex Co., New York, in late May. It has since 

 been found commonly at Amherst, Massachusetts, where it flies 

 during the month of May. In 1923, the fly was on the wing from 

 May 8 to May 20; in 1924, from May 3 to May 29. During the 

 early part of its flight-period, it is associated with such crane- 

 flies as Ormosia innocens (O. S.), Ormosia nuhila (O. S.), Neolim- 

 nophila ultima (0. S.), Dicranota eucera 0. S. and Rhaphidolahis 

 cayuga Alexander. At the end of this flight-period, all of the 

 above have disappeared and have been replaced by Dicranomyia 

 liherta O. S., Erioptera (Hoplolahis) armata 0. S. and Tricyphona 

 inconstans (O. S.). This interesting little crane-fly is character- 

 istic of small sunken streams flowing between high dirt banks. 

 In the hollows of such banks the flies lurk and swarm in small 

 dancing groups over the water. Besides the above records for 

 Hampshire Co., the fly has been taken at the following stations 

 in Franklin Co.: Mt. Toby, altitude about 700-800 feet. May 20, 

 1923; Fish-hatchery, near Sunderland, May 5, 1924. 



Ormosia fernaldi, new species. 



General coloration brownish gray; antennae of male relatively elongate; 

 wings tinged with gray, the stigma more infuscated; cell 1st M2 open by the 

 atrophy of the outer deflection of Mz; cell 1st A widest at the wing-margin; 

 outer dististyle of male hypopygium oval in outline, smooth; inner dististyle 

 produced into a long, straight, simple rod. 



Male. — Length about 3.2 mm.; wing about 4 mm. 



Female. — Length about 3.5 mm.; wing 4-4.2 mm. 



Rostrum and palpi dark brown. Antennae relatively elongate, in the male, 

 if bent backward, extending to some distance beyond the base of the abdomen; 

 flagellar segments elongate-cylindrical to fusiform; antennae black throughout. 

 Head dark gray. 



Thorax dark brownish gray without distinct stripes, the pleura somewhat 

 clearer gray. Halteres pale brown, the knobs yellowish. Legs with the 

 coxae brownish gray; remainder of the legs dark brown. Wings tinged with 

 gray, the costal and stigmal regions vaguely more infuscated; veins darker 

 brown. Venation: Sci ending opposite r, Sc2 near midlength of Rs; r at fork of 

 Ro+z] cell 1st M2 open by the atrophy of the outer deflection of M3', basal 

 deflection of Cui just before the fork of M; anal veins gently divergent, cell 

 1st A being widest at the margin; distal third of vein 2d A running generally 

 parallel to vein 1st A. 



Abdomen dark brownish gray. Male hypopygium with the apparent ninth 

 sternite (morphologically the ninth tergite) conspicuously projecting as a 

 depressed lobe, widened outwardly, the caudal margin gently concave. Outer 

 dististyle a small, flattened-oval appendage arising from a wider base, the apex 

 obtusely rounded; inner dististyle broad and flattened at base, near midlength 

 suddenly narrowed into a long, straight, blackened tip, the apex simple and 

 obtusely rounded ; angle of curvature of this style filled with a pale membrane 

 that is set with microscopic tubercles. Gonapophyses appearing as slender rods 

 that are gently sinuous, the tips subacute, extensively blackened. 



