JOHN B. SMITH, SC. D. 365 



Geometralis is uniformly chocolate brown, with exactly the same 

 markings as the preceding. Usually the space beyond the t. p. 

 line is a little darker than the basal area, and sometimes there is a 

 distinct yellowish tinge, leading to the belief that after all we have 

 only a well marked race or variety rather than a species distinct 

 from pyralis. 



Both sexes of both forms occur, however, and my material has 

 not been large enough to warrant me in making the union definitely. 



Habitalis, incusalis and i^eversalis agree in having the middle 

 tibite of male thickened, a little distorted and with a tuft of long 

 hair. In addition, the wings on the underside are provided along 

 the costal vein with fine hair which extends over and partly across 

 the median cell. On the primaries this is rather an even fringe, 

 while on the secondaries it is a narrower, fiat tuft, which is triangu- 

 lar in outline and drawn out to a point. There is also a basal hair 

 pencil at each side of the abdomen, similar to that in the preceding 

 species ; but the tufts are not quite so conspicuous. 



Habitalis has a conspicuous dark reniform, very even pale median 

 lines, and a punctiform s. t. line; the t. p. and s. t. lines tending to 

 extend across the secondaries. It is a small species, almost uni- 

 formly luteous red- brown in ground color. 



Reversalis is somewhat larger, greenish gray, with olivaceous 

 darker shadings, the median lines dark and diffuse and the reniform 

 not conspicuous. The secondaries are smoky, with the t. p. and s. 

 t. lines traceable. Altogether the species does not in the least resem- 

 ble the preceding and is not much nearer to the following. 



Incusalis is a brightly marked form, varying in ground from yel- 

 lowish to creamy-gray and even to reddish gray. The median lines 

 are almost always distinct, usually black and shaded with black or 

 brown toward the centre so that occasionally the median space is 

 solidly dark filled. There is every intergrade between the two so 

 that there is room for pretty series. The t. a. line is outwardly 

 oblique, nearly rigid ; the t. p. is nearly straight to the middle then 

 sharply incurved so as to leave a usually well defined angle. The 

 reniform is inconspicuous or altogether wanting. 



None of the other species have secondary sexual modifications of 

 any kind so far as observed, except that in some the antennae are 

 more obviously ciliated than in others. 



Two species have the median lines rigid, oblique, subparallel, the 



TRANS. AM. ENT. SOC. XXXIII. DECEMBEE. 1907. 



