Hist., Vol. XXIV, p. 515, which was in part based on alcoholic 

 specimens. 



The eggs of this species were received from Mr. W. N. 

 Tallant, of Columbus, O. They were laid July 20th and the larva; 

 hatched Aug. loth or nth. It feeds at first socially on the aspen, 

 eating out patches on the under surface of the leaf. 



j^jrjr. — Diameter about 0.6 mm. Hemispherical, rather iiigh ; 

 the shell is thin, white (the egg is reddish just before the larvc^ 

 hatches). The shell under a Tolles >< inch objective is seen to be 

 covered with minute polygonal cells which are tolerably distinct, 

 with slightly thickened walls. 



Larva, s/aj^f I. — (Hatched .\ug. 10-11. Described two days 

 after hatching, and also from alcoholic specimens of the same 

 brood.) Length 3 mm. 'I'he body is rather long, cylindrical, 

 head rounded, but little wider than the body at first before the 

 latter becomes filled out after eating a few days, as later it is no 

 wider than the body; it is shining jet black, and provided with 

 scattered, long, stiff, tapering bristles. The prothoracic and 

 suranal |)hites arc shining brown-black. The former is moderately 

 large, about three times as broatl as long, irregularly trapezoidal, 

 narrowing a little behind, and shows no signs of division into two 

 halves; four hairs arise from the front, and four from the hinder 

 edge. The piliferous warts on the thoracic as well as abdominal 

 segments are more or less conical, and f/o/ie bear more t/iaii a siiigii' 

 hair. The 2d thoracic segment bears two minute median dorsal 

 tubercles, one on each side of the median line of the body, and 

 smaller than those on the third segment, while the ne.xt one on 

 each side of the body is larger than the homologous ones on the 

 3d thoracic segment, 'i'he tubercles on the 2d and 3d thoracic 

 segments are arranged across the segment in a straight line, four 

 of them being visible on each side above. On the abdominal seg- 

 ments the four dorsal tubercles are arranged in a more or less 

 curved line, the curve becoming more marketl towards the entl 

 of the body, until on abdominal segment 8 the curve is almost 

 semicircular. On the first abdominal segment the two median 

 tubercles are lari^cr than any on the thoracic segment, and are 

 larger than the subdorsal and lateral ones on the segment in 

 (luestion, and are decidedly larger than the homologous ones on the 

 2d to jth abdominal s^xment.s: The four dorsal tubercles on segments 

 2 to 7 are all of the same size, but the trco on the 8th segment arc 

 nearlx as hv\^e as those on the /st, and are about twice as large as 

 those on the jth abdominal segment : on the Sth segment, however. 



