REVISION OF SPECIES OF THE GENUS AGKOTIS. V 



snout or beak, wliicli cliaracteri/Avs the foiuis related to c)ipi<h(, which is 

 the typical species. 



I recognize three groups in this genus based upon color, luaculation, 

 and tuftings. Chirdinyi with yellow secondaries is typical of the first; 

 cupida with complete ordinary spots, no or but indelinite thoracic 

 tufting, is typical of the second; while the third, with V-shaped, open 

 orbicular and more distinct thoracic tufting, is typical of the third. 



Adelphngrotis also has simi»le male antenme; the abdomen is not de- 

 pressed but cylindro-conic, the primaries elongate, trigonate, the thorax 

 with distinct anterior and posterior divided tufts. Stellaris may be 

 considered typical of this genus. 



Platayrotls is structurally close to the preceding, Imt the wings are 

 wider, more frail in a[)pearance, the thoracic tuftings indelinite. The 

 species have an entirely different habitus, and speciosa may be consid- 

 ered typical. 



Euerctagrotis contains a few species differing from all the preceding 

 by wide primaries with strongly arched costa and rounded apices and 

 outer margin. The antennie are finely serrated in the male, and the 

 thorax is prominently tufted, the crest divided. iSi(jmoides is the typi- 

 cal species. 



Ahagyotis is based upon a singularly intermediate form, with the wing 

 form of lihynchagrot is, with the serrated and bristly tufted S antenntTj 

 l)eculiar to some of the later genera, and a distinct, keel-like, thoracic 

 crest. The combination is unique, crrat'ica, being type and only species. 



Semiophora differs from all the preceding in the bipectinated male 

 antennte. The prinuiries are wide, the costa arched, somewhat as in 

 Eueretagrotis. The genus is not a very compact one, the forms differing 

 in habitus to some extent. Gathcrma is the generic type. 



With this ends the series in which the anterior tibiie arc not spinose. 

 It comprises the smaller number of s])ecies, and except in Rlujnchagrotis 

 there is little difficulty in identification. 



In the second series two obvious divisions are possible, the first hav- 

 ing th(i front of head smooth and flat ; the second with the front rough, 

 protuberant, or tuberculate. The character is easily made out by using 

 a fine pin, which drawn over the front will with a very little care <le- 

 tect the nature of the structure concealed by the vestiture. 



Of the first division Pachnobia is characterized by loose, hairy vesti- 

 ture. The species have a bombyciform ap})earance and are generally 

 reddish or ferruginous in color. In antenual structure they vary from 

 simple to pectinated, further subdivision on this character being here 

 deemed inadvisable. The other genera all have a mixed or scaly vesti- 

 ture much nu)re compactly disposed. 



Setdgrotis is characterized by having S antennic, with the joints lat- 

 erally furnished with bristly tufts. The primaries are normally trigo- 

 uate and the habitus refers rather to the later groups than where here 

 interpolated. The generic type is planifrons. 



