91 



One series of experiments, I am well aware, does not always 

 eliminate a principle from tangled matter but it may mark the 

 road to one, and in this case at least I was influenced to be- 

 lieve more strongly in the theory of' an equal distribution of in- 

 stinct among individual members of the same species. 



New Species of Moths 



By a. K. Grote. 



Agrotis dolis. n. s. 



? . All the tibiae armed. Forewings and head and thorax 

 entirely smooth leaden gray, a little darker than muraenula. Lines 

 wide apart, appearing pale and faint. Exterior line without the 

 dark dots of muraeiiida, a succession of pale small scallops formed 

 by the ptile shade preceding the line itself. Ordinary spots con- 

 colorous, of the usual shape, defined by pale ringlets, moderate, hardly 

 legible. Subterminal line near the margin, fine, irregular, powdery. 

 Hind wings pale smoky, with whitish fringes. Beneath whitish 

 with faint traces of discal S2:)ots and the commencement of mesial 

 shade lines, i^xpanse 35 mil. Colorado, Mr. Geo. D. Hulst, No. 26. 



Agrctis sublatis. :n-- «• 



S . The species appears allied to aratrix. Antennae simple, all 

 the tibiae spinose. Fore wings with full exterior margin, apices 

 somewhat rounded. Pale purply gray. Stigmata concolorous ; or- 

 bicular incompletely defined, rounded. The dusty median shade 

 tolerably distinct, and the cell between the spots blackish. Ee- 

 niform moderate with dusky ringlet. Posterior line single, black, 

 dentate, fine. Subterminal line preceded by a broken brown 

 shade. A terminal series of fine black points. Fringes fuscous, 

 indistinctly interlined. Hind wings fuscous with paler fringes. 

 Beneath the hind wings and costa of primaries are whitish 

 or paler, veins and forewings dusky ; a common exterior shade band 

 and discal lunules. Head, thorax and collar concolorous with fore 

 wings. Expanse 34 mil. Colorado, Mr. Geo. D. Hulst, No. 76. 



Agrotis Worthingtoni ^"^^ s. Male antennae bipectinate ; eyes 

 naked, all the tibiae spinose. Size moderate, ornamentation simple, 

 color pale mouse gray. Thorax shaded with brownish. Anterior 

 line faint, single, marked with black dots on the veins. ClaWform 

 absent, orbicular a small black ringlet or dot, reniform upright, 

 narrow, moderate, pale yellowish with interior black line, situated 



