372 NEW YORK STATE MUSEUM 



nounced in color, both the black and reddish being more 

 vivid; maxillary palpi black, and shorter than the antennae. 

 Thorax black above with sparse yellow hairs; legs some- 

 what lighter in color, tip of the tarsi not black; hairs 

 upon the legs longer than those of the female. Wings 

 hyaline, veins and base yellowish brown. Abdomen black with 

 grayish white posterior margins to the segments dorsally and 

 laterally, and covered with longer yellowish hair. Described 

 from two bred specimens. 



Larva. Average length when full grown 7mm to 8mm, sub- 

 cylindric, the club-shaped posterior third of body being twice as 

 stout as the thoracic joints, and joint 4 the most constricted. 

 Translucent when living, dirty white in alcohol. Immaculate in 

 a very few specimens; distinctly marked in the great majority 

 with brownish dorsal cross bands in middle of joints, leaving free 

 a white mediodorsal longitudinal line. Thoracic joints with 

 three irregular rings of the same color; underside more or less 

 irregularly spotted with brown. Head subquadrate, horny, yel- 

 lowish brown, with a number of brown spots and lines in regular 

 order, and two roundish, approximate ocellate, black dots on 

 each side under the skin, and seemingly rudimentary organs of 

 sight, from which the future eyes originate. Antennae uni- 

 formly pale, three jointed, about one third as long as greatest 

 width of the head; joint 1 very stout, fully four times as thick as 

 2, which is a little longer than 1, straight, slightly tapering 

 toward the tip. Joint 3 extremely small, a mere triangular tip; 

 mentum subtriangular, with apex cut away, and replaced by 

 three groups of very small teeth, of which the central group con- 

 sists of three teeth, the middle one largest; and the groups on 

 sides, of four teeth, of which the second from center is largest. 

 Sides of mentum, near the apex, with two small teeth each; all 

 the teeth are chitinous and black; a long erect bristle, pointing 

 upward and inward, near each side of mentum; labrum horny, 

 densely covered with hair; mandibles resembling in shape the 

 profile of the inverted last joint of the human thumb, with a 

 series of teeth in place of the nail. Teeth difficult to see, owing 

 to the presence of five distinct brushes of hair; on extreme 

 lower tip of mandibles three large teeth ; below them a series of 

 11 slender and very pointed teeth, of which the first two are the 

 smallest, teeth 3 to 9 increasing and teeth 10 and 11 decreasing 

 gradually in length; a second series of teeth below them consists 

 of two triangular teeth, of which the first is largest. Maxilla 

 stout, fieshy, with an internal thumb-shaped lobe; maxillary pal- 

 pus two jointed, first joint cylindric; second very short, crowned 

 with a regular circular row of short spines or warts; labium 



