MEMOIIJS OF THE NATIONAL ACADEMY OF SCIENCES. 251 



Fore wings witli ;i heavy distinct black line near tlie base, straight and ending' on the median 

 vein: basal scalloped black line on th<^ basal third of the wing. A black costal spot in front of 

 tlie discal mark, which is linear, black, curved, and distinctly defined. No line behind. Extra- 

 discal line sinuous, doubly scalloped, inclosing whitisli gray scales. Subniarginal shade some- 

 what recalling that of II. pulvcrca^ but narrower and less scalloped, niucli dislocated on the first 

 median venule. Fringe coucolorous with the wing, with a line black line at the base and « itli 

 linear venular spots. 



Hind wings white, with a bhick line at the base of the fringe and witli dark venular spots. 



Underneath, botli wings are white, a little sordid on the costal region of botli pairs of wings, 

 and the fringe of both wings is spotted with black. 



Expanse of wings, 3 36 mm.; length of body, S lO mm. 



Tills is a very distinct, well-marked specie.^, and witli a submarginal blackish shade as in 

 H. pulcerca, but narrower and more dislocated. 



GeoiiraphicnJ distrihiition. — "Clifton, Bosque County, Tex., March L'o, April in and 21" 

 (Belfrage); Texas, Arizona, (French). 



Heteiocanipa chapmaiii Grute. 



Helerocampa chajimatii Grote, Bull. U. S. Geol. ami Gecgr. Survey (Haydeu). vi. No. 1, p. 258, Feb. 11, 1891. 

 Kiiby, .Syn. Cat. Li-p. Het., p. 5G4, 1892. 

 Neuiii. and ]>yar, 'Pnm.s. Anier ICut. t>oc., xxi, i>. 20.", June. 1S91. 



I had, from Grote's description, regarded tliis as identical with H. astarte, but since then Dr. 

 Thaxter has kindly shown me his three specimens, which were those he lent Mr. Grote, and 

 which were his types. They were obtained at Appalachicola by Dr. Chapman. The species is 

 figured by Abbot in his manuscript volume of drawings in the library of the ISoston Society of 

 Natural History. 



One S , two 9 . Very similar to //. dstnrte in style and ]>osition of markings, and it may, when 

 we know the larva, be found to be only a variety of it, though quite a distinct one. It difters 

 from H. (istarte as follows : 



The black lines and the dusky shades and patches on the fore wings in E. asturte are in 

 H. chuiimani reddish brown, and the olive greenish shade is in //. chapmani pale, almost whitish 

 ash, and on the scutellar region of the thorax reddish brown instead of dusky. 



Fore wings with the basal line indistinct, reddish brown; no distinct dark, curved, black line 

 on the internal edge of wing as there is in H. iistttrtc. The two scallojied intradiscal lines as in 

 E. astarte, but reddish brown. The discal line is less curved than in E. axtdrtc, and not black, 

 but deep reddish brown. The three extradiscal scalloped lines just as in E. asfaric. but dark 

 brown, not black. The submarginal oblique shade so distinct and black in II. (i.starfe is in the 

 ])resent form reddish brown, as is the submarginal scalloped line, and the scallops are within 

 filled in with spots of reddish brown; the dark sj^ots on the fringe are reddish. 



Hind wings not white at the base as in E. a.sfi(fti'. but subocherous or snuff-brown; a median 

 shade as in E. atstaite. the outer edge of the wing broadly shaded with pale ocherous brown, but 

 this shade is broader than in E. astarte. Beneath shaded as in E. astarte, but the hue is 

 ocherous brown rather than dusky or blackish. Length of body, 9 l'l'-23 mm.; expanse of 

 wings, 9 ."iS nun. 



It will be seen that the difference in the two species or forms is in the color, and not in the 

 shape and position of the markings, but at first sight the two look quite different, and 

 provisionally should be regarded as so; this is also the view of Grote and of Thaxter. Yet it is 

 very plain that E. obliqua, astarte, and chapmani have originated from a common ancestor. 



