80 JOHN B. SMITH. 



Hydrcecia rigida Grote, pi. 1, fig. 18, % genitalia. 



1877. — Grote, Can. Ent., ix, 87, Gortyna. 



1881.— Grote, Bull. Geol. Surv., vi, 269. Gortyna. 



1882. — Grote. Papilio, ii, pi. 1. f. 3 and 3a, Gortyna. 



1882.— Grote, 111. Essay, 58, pi. 2, f. 24, Gortyna. 



1893— Smith, Bull. 44 U. S. Nat. Mus., 176, Hydrcecia. 

 Ground color very pale straw yellow. Head purplish gray, except on the ver- 

 tex, which is of the ground color. Base of the collar also tinged with purplish 

 gray. The bases of the patagia- and anterior tuft are also purplish. The same 

 shade may he found in some specimens at the base of the abdomen. Primaries 

 shaded with purplish between the basal and t. a. lines above the submediau 

 vein, and also in the s. t. space below the apex. Basal line geminate, brown, ex- 

 lending to the middle of the wing. T. a. line apparently single, the inner por- 

 tion merged into the dusky shade: broadest and most prominent from the costa 

 to the median vein, to which point it is outwardly and evenly oblique. It forms 

 a rectangle above from that point to the suhmedian vein and is then curved out- 

 wardly, the line appearing geminate at this point. The t. p. line is unusually 

 close to the outer margin, but starts from the costa just within the apex and runs 

 evenly oblique to the hind margin, leaving an unusually wide median space. S. 

 t. line narrow, brown, lunulate. with distinct outer teetli on the veins; usually 

 better defined by the. difference between the purplish s. t. and paler terminal 

 spaces. In some cases the terminal space is almost as dark as the s. f. space and 

 in such cases tile s. t. line is scarcely traceable. The apex is of the ground color. 

 There is a narrow terminal line at the base of the fringes. Median line narrow, 

 brown, with an even outcurve, which is bent just below the lower angle of the 

 median cell. The ordinary spots are of good size, ringed with brown ; orbicular 

 round or nearly so. sometimes with a brown central dot: reniform upright, a 

 little constrictly centrally. In some specimens there is an inner lunule. Second- 

 aries very pale yellowish, almost white ; a blackish line at the base of the fringes, 

 sometimes an outer dusky line and occasionally with a lunule and marginal 

 shading. Beneath very pale, the veins smoky, sometimes with a discal lunule, 

 and more frequently with a smoky outer line. Expanse 1.25-1.45 in. : 31-36 mm. 



Hub.— Kittery Point, Maine, September 14th ; Torrington, Conn. ; 

 Onondaga Valley, N. Y., September 15th; Massachusetts; Illinois. 



It is probable that this species is found throughout New England 

 and a portion of the Middle States, west to the Mississippi River; 

 but it is by no means common. It shows very little variation, and 

 its very pale straw yellow color will serve to distinguish it. The 

 genitalia are after the usual type in this series. The male antennae 

 are furnished with short cilise. 



Hydrcecia harrisii Grote, pi. 2, fig. 19, % genitalia. 



1881.— Grote, Bull. Geol. Surv., vi, 268. 276, Gortyna. 



1893.— Smith, Bull. 44 U. S. Nat. Mus., 177, Hydrcecia. 

 ( ; round color a rusty red-brown, underlaid by a yellowish shade, very powdery. 

 Head shaded with purplish, collar purplish, except at the tip where it is yellow- 

 ish : patagia? more or less purplish, with a tendency to a yellowish powdering in 

 the center, which sometimes embraces the entire thorax. Abdominal tuftiugs 



