REVISION OF SPECIES OF THE GENUS AGKOTIS. 15 



from Maine nortliwaid, and is attracted by light. I have not been able 

 to compare Siberian specimens, and as Mr. Grote has accepted the rele- 

 gation of his species into the synonymy, I follow Mr. Morrison's refer- 

 ence. 



Group CUPIDA. 



The species wliich I bring together in this group, form an aggrega- 

 tion rather sharply defined from the other si)ecies of the genus and en- 

 titled perhaps to distinct generic designation. They really represent in 

 our fauna the yellow winged species of Europe for which Tnphivna has 

 been used, and oi vfhich. pronuha may be considered typical. The head 

 is small, front smooth, narrow, gently rounded, not bulging; the eyes 

 moderate, the palpi short, projected straight forward, second joint en- 

 larged at tip, less so in the first subgroup, terminal joint minute. The 

 front has a small pointed tuft which with the straight palpi form a short 

 compressed snout, less evident in rujipectus and bninncicolUs and agaiii 

 j)erceptible in some species of the exseriistigma group, but yet so evi- 

 dently marked in the second subgroup that by this character alone 

 could the species be recognized. Other characters are, however, not 

 Avanting. The thorax is depressed, smoothly clothed except in the 

 aberrant mirabilis, the vestiture being scaly, with an admixture of flat- 

 tened hair. Abdomen flattened, truncate at tip, the appearance most 

 evident in virgin 9 9 or in those which have oviposited. The gravid 9 

 has the abdomen distended, cylindric, with an obtuse conic tip, and yet 

 even then the depressed appearance remains, and is very distinct from 

 the nornml type. The primaries are comparatively narrow, subequal 

 in most species, or when they are trigouate, then the wing is rather 

 short, and never ami)le. In the typical species the ornamentation is 

 nearly identical, diflering only in minor details. The ordinary spots 

 are always present and always complete, though occasionally they are 

 very faintly traceable. In nearly all the species the terminal space is 

 more or less discolorous, or at least slightly paler than the ground color, 

 though this is variable in specimens of the same species. As a whole, 

 the species of the group are recognizable at a glance. 



Two evident subgroups may be recognized, the first containing rvji- 

 IK'ctufi Morr., and hrunneicolUs Grt., and the other, the balance of the 

 species. In ornamentation the species agree in having the head and 

 collar darker than ground color, which is the case in no member of the 

 next subgroui>. The palpi are not so evidently formed into a snout, 

 and the abdomen is longer. Among themselves the species differ in 

 the darker color, and purijlish red body vestiture of rujipectus^ and in 

 the narrow primaries and ample secondaries as well as pale color of 

 brunneicollis. Another common character which separates them from 

 the other species is the form of the S genitalia, which are somewhat 

 allied to chard'inyi. Here the harpes are membraneous, broad, only 

 slightly concave, the tip slightly produced superiorly and rounded. 



