THE CRANE-FLIES OF NEW YORK PART II 823 



as Geranomyia canadensis, Dactylolabis montana, Tipula ignobilis, T. api- 

 calis, and similar forms. The larvae live in and beneath the saturated 

 cushions of moss (Amblystegium) that grow on the shale near the water's 

 edge. The only associated crane-fly larvae found near Cascadilla Creek, 

 Ithaca, New York, where this species is common, were Tipula ignobilis, 

 the larvae of both species being exceedingly abundant. 



Larva. Length, 10-12.2 mm. 

 Diameter, 0.6-0.7 mm. 



Color pale whitish with a green cast; transverse abdominal welts dark brown. 



Form rather long and slender. In addition to dorsal and ventral welts on abdominal 

 segments 2 to 8, a complete band at base of metathorax and ventral bands on mesothorax 

 and first abdominal segment; ventral abdominal bands larger and more conspicuous than 

 narrow dorsal welts. A few erect setae on body. Spiracular disk (Plate XXVII, 105) rather 

 small, with a deep vertical split, the large ovate spiracles capable of close approximation; 

 ventral lobes blunt, with a black spot on face, fringed with short black hairs and with two 

 sensory setae; each blunt lateral lobe narrowly lined with a black crescent; dorsal lobes very 

 small, dusky; spiracular disk fringed with short, dark hairs. Anal gills four, large and pale. 



Head capsule as in tribe. Labrum (Plate XXVII, 106) subtriangular; anterior margin 

 broad, nearly straight across, with a dense fringe of hairs which are coarser at ends of 

 lobe; near anterior margin of labrum two oval, hyaline areas, each with three short papil- 

 lae; a few sensory setae along anterior margin. Mentum (Plate XXVII, 107) broad, 

 anterior outline triangular, running out into a rather long apical point, each side with about 

 five teeth. Hypopharynx (Plate XXVII, 108) as in this group of genera, consisting of a 

 collar of two chitinized combs, each with about ten sharp teeth. Antenna (Plate XXVII, 109) 

 short, cylindrical, the apical papilla very small, reduced to a tiny disk. Mandible (Plate 



XXVII, 110) broad, flattened, with a blunt apical point which is only a little longer than 

 the teeth on either side of it; ventral cutting edge with about five blunt teeth, which are 

 gradually smaller from the outermost toward the base; inner face of mandible with a blunt 

 prosthecal tooth and an oblique fringe of coarse setae. Maxilla (Plate XXVII, 111) with 

 the cardines large, with about three setiferous punctures; stipites short, cylindrical; outer lobe 

 fringed with long hairs and bearing the short, flattened, disklike palpus, which has five or six 

 hyaline pegs; inner lobe smaller, with dense, short hairs and a few sensory organs. 



Pupa. Length, about 6 mm. 



Labrum very obtusely rounded at apex, not bilobed. Labial lobes straight across or very 

 slightly convex across posterior margin. Maxillary palpi narrowed toward tips (Plate 



XXVIII, 112). Pronotal breathing horns (Plate XXVIII, 113 and 114) elongate-oval, 

 earlike, the ventral margin more bulging, the apex a little narrowed but obtuse; a row of 

 breathing pores along outer margin, beginning on lateral face near dorsal margin, these few 

 in number and widely separated, becoming more numerous toward apex of organ. Leg 

 sheaths as usual in this group of genera, those of fore legs the longest, those of hind legs 

 the shortest. Male cauda (Plate XXVIII, 115) with ventral lobes (Plate XXVIII, 116) 

 large, bluntly rounded at tips; two small, brown, approximated tubercles at base of split on 



