September 1897.] 



PSYCHE. 



117 



as for instance his oc^nlatus, debilis, 

 minimus and sylvestris, yet it is not 

 even suggested tliat these may possibly 

 be forms of one mutable species. A 

 very close resemblance in general 

 appearance between members of differ- 

 ent genera is not uncommon in this and 

 in other groups, as for instance among 

 some of the Heliconiid butterflies. 



Finally, Prof. Osborn's characteriz- 

 ation of the conglomerate species nigri- 

 frons as a whole, is totally inadequate, 

 as it would readily include seveial very 

 distinct undescribed species from the 

 southwest U. S., Mexico and South 

 America. 

 Deltorephahis Jlavicosta Stal. 



1S63 Stal, Kongl. Vet. Akad. Handl. 

 Bd. 3. No. 6. p. 53 (flavicosta). 



1S92 Van Duzee, Can. Ent. XXIV. 

 p. 116 (flavocostafus) . 



This species is common throughout 

 the moister tropical and subtropical 

 regions of America, at low altitudes. 

 Osborn now records it from Iowa. I 

 have it from Jklaryland, D. C, Ohio, 

 Kansas, and various points in the low- 

 lands of Mexico and South America, 

 the Herbert H. Smith collection con- 

 taining specimens from Corumba, 

 Chapada, Villeta Paraguay, and Piedra 

 Blanca in Bolivia. The Nat'l Museum 

 collection contains specimens from Va., 

 and D. C, the latter taken on grape. 

 The more southern forms are quite 

 generally lighter. 



This is Uhler's manuscript retro/sus. 

 Van Duzee's redescription was fortu- 

 nately under practically the same name. 

 It seems rather peculiar that Osborn did 



not reduce this species also to a synonym 

 of nigrifrons. 



Deltocefhalus bimacidatus G. & B. 

 In the '■ Review," Jiavoviretis is made 

 a synonym of this species, though no 

 reasons for so doing are given. I have 

 before me large series of the males and 

 females of both species, and they are as 

 distinct as any two species in the genus. 

 They are well separated as originally 

 described. 



Deltocephalus debilis Uhl. I have 

 seen nothing from this country approach- 

 ing the European falleni^ but we liave 

 abdominalis and ?ninki, which are 

 both good and distinct species, long 

 known, described and figured in Europe, 

 and represented in my own collection 

 by very large series of both European 

 and American specimens. Debilis is 

 certainly quite variable but it runs into 

 neither abdotninalis nor mitiki. It 

 would make a peculiar case indeed if 

 two species, in Europe entirely distinct, 

 should have in this country intergrada- 

 tions so numerous as to make them 

 inseparable, and yet the aggregate of 

 these intermediate forms be known 

 under a later American name. 



Even in forms of debilis with the 

 elytra entirely black, I have never seen 

 a specimen with the face black after the 

 manner of abdominalis. The three 

 species can be easily separated on the 

 form of the female segment, variable 

 though it may be in debilis. They also 

 ditler in the male claspers, an impor- 

 tant character used long ago by Fieber, 

 but not mentioned for any of the species 

 in Osborn's paper. If Prof. Osborn 



