886 CHARLES PAUL ALEXANDER 



LVI, 284) with ninth sternite elongated, cylindrical, its tip rounded, feebly split beneath; 

 ninth tergite very long, pointed, with a deep median split. 



Nepionotype. Ithaca, New York, May 1, 1913. 



Neanotype. With type larva. 



Paratypes. Numerous larvae and pupae witji types, May 1-15, 1913. 



Eriocera cinerea Alex. 



1912 Eriocera cinerea Alex. Psyche, vol. 19, p. 169-170, pi. 13, fig. 9. 



Eriocera cinerea is locally common, flying in May. The larvae were 

 found on May 16, 1917, in sand along the banks of Cascadilla Creek, 

 Ithaca, New York. They have been found at various dates during the 

 past few years, but always in scanty numbers. Larvae found on April 

 28 were associated with larvae of Hexatoma megacera, Eriocera spinosa, 

 Atherix, and other insects. The larvae are stouter than those of E, 

 longicornis and are pale whitish yellow, quite devoid of the greenish tints 

 of the latter species. A larva found on April 28 transformed to an adult 

 female on May 16. Additional larvae and pupae were found on May 

 24, and a few pupae on May 30, 1917. 



The supposed larva of E. longicornis described by Alexander and Lloyd 

 (1914:21-23) pertains to this species; the true longicornis is discussed 

 later in this paper. 



Larva. Length, 15-16 mm. 

 Diameter, 2-2.2 mm. 



Color light yellow. 



Form almost terete, abdominal segments subdivided into two annuli. Subterminal 

 abdominal segment greatly enlarged, capable of great distention. Spiracular disk (Plate 

 LIV, 263 and 264) very reduced, the usual four lobes exceedingly small; ventral lobes prac- 

 tically obsolete, not projecting, each fringed with from twenty to thirty long, golden-yellow 

 hairs; lateral lobes very short, triangular, fringed with from twelve to fifteen long hairs; 

 a faint dusky mark from dorsal margin of each spiracle to edge of field; a faint vertical stripe 

 between spiracles; ventral lobes marked with brownish black, the mark of each side three- 

 pointed at its inner end, the innermost of these points connected with its fellow of the 

 opposite side; lateral lobes with the marks elongate, triangular, the points directed outward. 

 Spiracles small, oval, separated by a distance a little less than the diameter of one. Anal 

 gills four, very short and inconspicuous. 



Head capsule long and narrow, measuring about 1.5 by 0.275 mm.; dorsal plates of capsule 

 with proximal anterior angles produced inward. Labral sclerite (Plate LII, 253) having 

 labrum itself subquadrate. Mental region entirely lacking strongly chitinized points as in 

 this group of genera. Present species showing a structure which is probably a part of labium, 

 either mentum or hypopharynx, and which has not been found in any other species of the 



