SI /;(,i:.\rs Aii.iauoTis, Sm. 



I'his .iihmiiiis is rh.'iracl cri/.cd liy llic scri'/ilc ;iii(l I'.'isciciilnlc 

 aiili'iiiini- ol' I 111- m.ilcs ■■iiid in li;i\ in:;- ;i dislincl keel like ri(l<j,c on 

 tlu" I'ol.l.'ir .-inil |u-(il lior;i\ (willi llir possiMc cxccpl ion of hinuir 

 (/'nialif!). 



Tlu' species seem lo l)e in a relali\fly slaMe slale of eNolnlioii. 

 beinj»; well delined mnilalieally ; as far as our preseiil knowledge 

 of thrill holds true. 



'I'he species Jicro. Morr. has Itecn sunk as a synonym in the 

 IJiMiniieicollis Ciroup as explained under tiiat name. 



Si'i'EHiK lAi, Key to Aragrotis Sp. 



I. — A contrasting butf costal margin hhnaryinalis 



II. — Not so. 



A. — Subterminal line and transverse posterior line ap- 

 proximately parallel throughout (except at extreme 



costal margin ; alcandola 



B. — S.t. and t.p. lines not appearing parallel througJiout, 



a. — UsuaUji with a decided rufous cast to the wings 



regardless of tlie ground color; mai'kings ustially 



not contrasting with the ground except the orb., 



ren., and s.t erratica 



b. — Wings sometimes with a rufous case, but usually 

 more ashen ; all markings more contrasting, the 

 t.a. and t.p. quite distinct, usually heavy. ./or??j ornatus 



Genitalic . Key to Si'ecies of Abagrotis 



(I. — Uncus with sharp-pointed end,) 



A. — Armature of penis an enormous spine, almost as large 

 as the juxta, and a chitenous plate with numerous 

 small toothlike spines. (Edge of valve with a pro- 

 jection about 2/3 as long as width of valve at this 



point .--- - alcandola 



B. — Armature of penis a single heavy spine set on a 

 chitenous hump. onlv. (lobation of valve at end^ 



not on the side.) erratica 



and form ornatiis 



(II. — Uncus with blunt end,) 



C. — Armature of penis a small spine without a chitenous 

 base or hump, and a plate with numerous small 

 heavy toothlike spines, the largest of these being 

 about 2/3 the size of the solitary spine. End of 

 valve simple and rounded) bimarginalis 



76 



