270 NEW YORK STATE MUSEUM 



the middle of the wing, and the first subcostal veinlet terminates 

 on the outer third of the wing, differing in these characteristics 

 from the more typical Chironorni. The abdominal hairs are 

 also shorter. 



Female. The female has short 7-jointed antennae, of which the 

 terminal joint is nearly twice as long as the one next to it; they 

 are slightly hairy. The female of our species differs from the 

 other true Chironomi in the shorter and stouter antennae 

 and shorter and smaller palpi. The eyes are much as usual, as is 

 the size of the head in proportion to the thorax. Our female 

 specimen was too incomplete for further description. 



The larvae were dredged-from Salem harbor. Packard, loc. cit. 



The terminology of the wing veins given above is as was given 

 by the author, and therefore does not conform to that used in the 

 other descriptions. 



5. Orthocladius flavus n. sp. 



Larva. (PI. 24, figs.ll to 17) Yellowish; head yellowish brown; 

 length about 10 mm. Head short, extreme apical margin of 

 labiuni and posterior margin of head black. Antennae yellow, 

 moderately long, about one fourth or one third the length of the 

 head, slender; apical joints very short and slender (fig.!2a). 

 Labrum flap-like, with rounded margin and having a pair of 

 widely separated short yellow setae, the lateral margin fringed. 

 Its under surface (and epipharynx?) differs considerably from 

 the usual type, consisting here of slender caudad projecting lobes 

 and the usual pair of lateral arms with black apices (fig.14) . The 

 mandibles (fig.12 md) 'are yellow, slender, pointed, and only the 

 tip and the teeth black. The inner membranous part has several 

 setae on its cephalic margin. The maxillae (fig.12 mx) are yellow, 

 broad, flattened, each with a short palpus and a number of 

 papillae. At the basal articulation are two branched setae. The 

 hypopharynx (fig.ll) is horseshoe-shaped, with papillae on its free 

 margin. The labium (fig.12 1) has several moderately long lateral 

 teeth, several blunt short teeth nearer the central line, and two 

 small sharp ones at the apex. The anterior feet are very short, 

 the yellowish brown claws simple and quite numerous. The body 

 is yellow, moderately stout, with a very few scattered, small, 

 slender setae. Posterior feet are rather short, about as long 

 as the last body segment, claws nearly black, each with two 

 teeth; the outer one slender, curved, the inner one straight, 

 stout, and about one third as long as the outer one, each foot 

 with 16 to 20 claws. The four anal blood gills are as long as. 

 the feet, blunt, and white in color. The two dorsal papillae are 



