THE CRANE-FLIES OF NEW YORK PART II 939 



(Subgenus Leiponeura Skuse) 



1889 Leiponeura Skuse. Proc. Linn. Soc. N. S. Wales, ser. 2, vol. 4, p. 795. 

 1915 Lipophleps Bergr. Psyche, vol. 22, p. 55. 



Gonomyia (Leiponeura) alexanderi (Johns.) 



1912 Elliptera alexanderi Johns. Psyche, vol. 19, p. 3. 



The beautiful crane-fly Gonomyia' alexanderi is locally common in the 

 eastern United States. The adult flies may be swept from rank vegetation 

 in the neighborhood of streams. When resting, the adults have a char- 

 acteristic position, the fore legs st'anding straight ahead and almost 

 parallel, the middle legs extended laterally and slightly forward, the 

 hind legs directed backward but widely divergent, and the wings folded 

 over the back. This is the characteristic resting position for the genus. 

 The larvae were found in some numbers in rather coarse sand, around 

 small pools of water near the Sacandaga River, Fulton County, New York, 

 on June 5, 1914. The adults emerged on June 16, giving a pupal period 

 of not more than eleven days and presumably much less. The description 

 and figures of the pupa are made from the cast pupal skin of the male. 



Larva. Length, 8.3 mm. 



Diameter, 0.4-0.5 mm. 



Coloration very pale yellow or yellowish white. 



Form terete, elongated, slender. Body with a sparse, pale pubescence, at posterior margins 

 of segments with a transverse erect ridge of stiff hairs. Spiracular disk (Plate LXXV, 403) 

 large, flattened, almost pentagonal in outline, surrounded by five lobes; dorso-medi^n 

 lobe small, slender; paired lobes very short and blunt; margin between lobes almost straight 

 or but feebly concave; when disk is partly closed, lobes appearing a little more prominent; 

 ventral lobes a little larger than lateral lobes; lobes heavily suffused with brown; on ventral 

 lobes a lateral dark brown line running dorsad to near spiracles, at its dorsal end connected 

 across disk by a paler brown suffusion; proximal stripes of ventral lobes shorter and paler, 

 above their inner ends with a small brown spot; lateral lobes almost entirely suffused with 

 brown, this entirely surrounding spiracles and in some specimens entirely suffusing disk 

 between spiracles, this mark bifid at its distal end; dorsal lobe indistinctly marked with 

 very pale brown; disk margined with short, pale hairs which are not interrupted and are 

 only a little longer at tips of lobes. Spiracles widely separated, the distance between 

 them being three or four times diameter of one; spiracles yellow, centers pale brown. 



Head capsule as in the tribe, the ventral bars broader than the slender dorsal bars, their 

 inner ends not expanded or toothed to form the mental plate. Labrum-epipharynx moder- 

 ately elongate, densely hairy. Mentum not chitinized; hypopharyngeal region a cushion, 

 covered with delicate, short setae. Antenna as in this tribe, basal segment moderately elon- 

 gate, densely hairy, apical papilla rather small, elongate-oval. Mandible (Plate LXXV, 402) 



