MAY PLIES AND MIDGES OF NEW YORK 



143 



(PI. 19, figs. 11, 12, 13, 14, 15, and pl.27, fig.6) 



Larva. The larvae were foiiucl in Ithaca and Saranac Inn, 

 N. Y. They are yellow with brown markings; length 6-7 mm. 

 Head brown, about twice as long as wide; antennae slender, 

 2.5 times as long as the mandibles, the l5asal joint about six- 

 sevenths of the whole length. Mandible slender (fig.l4 md) the 

 apex black and sharp, the two lateral teeth short and sharp. 

 Maxilla (mx) large with a mesad projecting process; its palpus 

 (p) jointed, about one-half as long as the mandible, with a pair 

 of apical papillae. Labium (1) with five black teeth, the laterals 

 larger and longer than the median; hypopharynx (h) with a 

 toothed margin, excepting its middle section (covered by the 

 labium) which connects the lateral parts. The anterior claws 

 are numerons, slender, curved at the tip but not i)ectinate. The 

 abdomen is glabrous. The posterior appendages resemble those 

 shown in fig.lO, having elongate dorsal papillae each with about 

 six apical setae. The claws of the anal prolegs ditler from those 

 of allied species in haviug.two on each foot stouter, and much 

 darker colored (fig.l2) than the others (flg.ll) . Besides the stout 

 dark ones there are the usual number of paler, stout marginals, 

 and slender centrals. 



Pupa. Dark yellow, mottled; length 3.5 to 4 mm. Respira- 

 tory organs ellipsoidal, dark colored (flg.l3), smooth surfaced, 

 the polygonal areas of the chitin distinctly visible. The apical 

 aperture minute. At the base upon the thorax there is a trans- 

 verse row of small, sharp tubercles. The surface of the abdomen 

 without hairs, excepting the lateral margin of the last two seg- 

 ments, which have four or five long filaments. The caudal fin 

 has two pointed lobes each with a pair of filaments. 



Imago. Whitish; antennae of the male with pale brown hairs; 

 of the female still paler; palpi yellowish. Thorax pale ashgray 

 with five narrow longitudinal stripes, with wider intermediate 

 spaces; the fine lines with hairs; scutellum reddish yellow, 

 metanotum brownish black. Abdomen of the male with a more 

 or less distinct interrupted longitudinal stripe, which broadens 

 on the last segments; the claspers whitish, rather short (pl.32, 

 fig.3). In the female the abdomen is wholly dark brown. Legs 

 white, with narrow broAvn rings, one just before the tip of the 

 femur, three on the tibia, two on the first tarsal joint and one 

 on each of the following joints. In the male the fore tarsi and 

 the hind legs are short haired ; the fore metatarsus about one- 

 fourth shorter than the tibia. Halteres white; wings with a 

 whitish tint, hairy, with brown bordered crossveins and many 

 brownish gray spots. R, is present, near the tip of R^ ; the cubitus 

 forking proxiraad of the crossvein. Length 3.5 to 4.5 mm. 



