( 129 ) 



Four subsj)ecies. 



A very sm.all s])ecimeu, said to be fniiii Texas, represents perhajis a tifth 

 geographical form. The subspecies are not dill'erent in the structure of the 

 sexual organs of the d. The ? genital armature lias only been examined of 

 chersis chcrsis. 



a. II. chersis mejicanus subs]), nov. (PL XIII. f. 6, cJ). 



fijihinx j/prelff/iiiis, Druce (non Edwards, 1874), Biol. Cciilr. Anier., Lep. Htt. Suppl. p. 319. n. .3 (b). 

 t. G7. f. H (1896) (Durango). 



6- Darker than oreodapluie and (■hersis., but grouud colour purer whitish grey, 

 without clayish shade ; the costal markings and the oblique subbasal ])ostcellnlar 

 double lino of the forewing obviously more distinct, as is also the dark shade at 

 the proximal side of the black snbmarginal line ; white fringe-spots very sharply 

 defined ; black discal band of hindwing broad, strongly angled externally at SM^ ; 

 basal half of cell of forewing below brownish black. The figure in the Bioloq'm is 

 too brown. 



? . Not known. 



Ilab. Mexico. 



In the Tring Museum 1 S from " Mexico," tijpe. 



Mr. Druce was misled in the identification of this insect by Hy. Edwards, who 

 determined the Durango specimen as pcrdeijans. 



h. II. chersis pallesccns subsp. nov. 



It is one of the objects of the systematist to elucidate facts, not to conceal 

 them. The diiferences between the subspecies of //. chersis are slight, but they are 

 there and must be registered. 



c? ? . As large as the average //. eh. chersis ; of the same white-grey ground 

 colour as mexicaiiiis, with which it agrees also in the sharply defined white fringe- 

 gjjots. A perfect transition from mexicanus to chersis. 



Hah. Arizona ; Colorado. 



In the Tring Museum 4 cJcJ, 2 ? ? from : Prescott, Arizona, 25. vi. '98 (Dr. 

 Knnze), tijpe : d ; Huathuca Mts., Arizona, Is. vi. '09 (Dr. Kunze) ; Dnrango, 

 Colorado, 10. vii. 'OK, 0.")(.»0 ft. (Oslar); Ft. Collins, Colorado ; Colorado, iv. 'O'J. 



c. H. chersis oreodaphm; (Fl. XIII. f. 0, i). 



'nnii. 



Sphinx umuclujihiie Edwards, Pror. Cat Ac. N. Sri. v. p. 1(19 (1874) (Napa C"., June) ; But!., Ti 



Znol. Sor. Loud. ix. p. 018. n. 8 (1877) (distinct) ; Kirby, Cut. Lep. Ilrl. i. p. 691. n. 3 (1892). 

 S/iliiiu: chersis var. ureorltijiline Edwards, l.r. \i. p. 93 (1H76) ; But)., Piipilin i. p. 104 (1881) 



(distinct) ; Edw., Hull. Amer. .l/»s. N. II. iv. p. 171) (1892) (Calif.). 

 •Sjihiiij- chersix, Strecker, I.ep. llhnii. Ilrl. p. 142 (1878) (iircitihiphne is syn. of chir.ii.f) ; Holl. 



Caiuiil. Ent. xviii. p. 102 (188(!) (urmduphiie is Fyn.). 



tj ?. Differs from //. rhi'rs/s chersis in its inferior size, in the black discal band 

 of the hindwing being narrower anteriorly, and in the comparatively smaller mesial 

 dashes on tlu^ underside of th3 abdomen. 



//"/;. California; Oregon; ])robably farther north. 



In the Tring Museum 3 c?<J from: (.'alif()?'nia : (iolden, Oregon, May 

 (Biedermann). 



We have received a photograph of the tyi)e of oreoc/aph/u: from Hy. Edwards's 

 collection, through the kindness of Mr. Beutenmiiller. 



