24 JOHN B. SMITH. 



I had, from sufficient material, considered this species as a variety 

 of the Eastern immanis, and I believe that there is some record of 

 its having similar habits in the larval state. The species is a very 

 good one, however, when abundant material is at hand. It runs 

 uniformly smaller, is narrower winged than the eastern species, and 

 there are other differences in the details of markings that will appear 

 on a comparison of the descriptions. The male antenna.' have the 

 joints distinctly marked and obviously brush tufted, though the 

 tuftings are short and of soft hair. The sexual organs are charac- 

 teristic ; the harpes rather narrow, stout, abruptly cut near the tip 

 which is bent, somewhat dilated and has a fringing of rather long 

 stiff spines. There are two clasper-like processes, the one nearest to 

 the base small and rather blunt, the other inserted at the point 

 where the harpe narrows, and this is more irregularly twisted. 

 The differences in size are quite strongly marked ; but in other 

 respects there is little range of variation, judging from the examples 

 before me. 



Hydroecia mediali* Smith, pi. 1, fig. 12, £, genitalia. 



1894. — Smith, Trans. Am. Ent. Soc, xxi, 74, pi. 1, Wydrcecia. 

 Ground color a dirty clay yellow, varying in shade to olivaceous in one direc- 

 tion and to distinct red-brown in the other. The median space of the primaries 

 always darker and most richly tinted. Head and thorax without markings, the 

 thoracic tuftings very feebly developed. Primaries with the markings rather 

 obscure. The basal line is not obvious in any specimen before me. T. a. line 

 pale, not contrasting, usually not margined inwardly, but sometimes with a slight 

 darkening of brown scales; outwardly marked by the difference in shade be- 

 tween the basal and median spaces. It is usually a little curved in the cell and 

 almost upright or only a little outwardly bent below that point. T. p. line pale, 

 forming the most prominent feature of the wing marking; abruptly bent on 

 the eosta and then very evenly oblique to the inner margin. S. t. line pale, de- 

 fined by the difference in shade between the darker terminal and pale s. t. space ; 

 but this difference is hardly appreciable. In some cases there is a brighter line 

 at the base of the fringes. Ordinary spots visible, never entirely outlined and 

 sometimes without distinct margins. Orbicular a little oval, oblique, somewhal 

 paler than the median space, in which it is situated. Reniform kidney shaped, 

 the upper portion fairly well outlined, as a whole a trifle paler than the sur- 

 rounding space; but there is a dusky lunule through the centre which becomes 

 darker inferiorly. There is a vague indication of a claviform in the shape of a 

 slightly paler streak extending from the t. a. line half way across the median 

 space. There is no visible median shade in any specimen before me. Second- 

 aries varying from soiled whitish to very pale, almost straw yellow; a distinct 

 dusky extra median line being present in all examples. Beneath a very pale 

 shade of the ground color, a little powdery and with a rather broad smoky line 

 on both wings. Expanse 1.60-2.05 in.: 40-52 mm. 



Hub. — Washington; Colorado, foot hills; Glenwood Springs; 

 collected by Bruce and Barnes*. 



