64 THE ENTOMOLOGIST. 



shaped ; no dog-ear marks ; lateral face-marks ending in an emar- 

 ginate truncation at about the level of the antennal sockets ; first four 

 tibiaB dark behind ; abdomen very dark brown, with obscure transverse 

 yellow bands, not reaching the lateral margins, at bases of segments 

 2 to 4 ; venter dark brown, becoming pale reddish apically ; second 

 recurrent nervnre scarcely visible. 



Var. a. <?, Upper part of clypeus occupied by a quadrate dark 

 brown patch, emarginate on its lower edge ; supraclypeal mark divided 

 into two spots ; abdomen with only the bands on the second and third 

 segments, these very obscure, and interrupted in the middle. 



Hah. Juarez, State of Chihuahua, Mexico, Oct. 6th, 1899 

 (Ckll.) ; two females, five males, all at flowers of Heliotr opium 

 curassavicum. P. heliotropii ? is close to P. stottleri, but 

 smaller, with the light parts of the abdomen much yellower ; the 

 male has face-markings a good deal like those of P. higelovice. 



Hypomaerotera callops, Ckll, & Porter, subsp. nov. persimilis. 



Both sexes a trifle smaller than the type ; female with the spot at 

 the apex of the wings usually distinct. Male with the flagellum clear 

 cream-colour beneath ; the legs with the black rather less developed, 

 and the light part of the face slightly tinged with yellow. There is 

 also a well-developed supraclypeal mark, and the marginal cell (male) 

 is considerably shorter than in callops. Face not so hairy in male as in 

 type. 



Hab. One male at flowers of Trihulns grandiflorus, Oct. 7th ; 

 many females at flowers of Physalis, Oct. 9th. All at Phcenix, 

 Arizona (Ckll.). I should hardly separate this on the female, 

 but the male is palpably distinct. 



Calliopsis coloradensis coloratipcs (Ckll.). 



This was described as a variety of C. flavifrons, but it is really a 

 subspecies of C. coloradensis. The female, not before described, re- 

 sembles that of coloradensis, but is easily distinguished by the clypeus 

 having only two minute dots, instead of two black bars, and by the 

 presence of the dog-ear marks. 



Hab, Mesilla Park, N. M., Sept. 1st, at flowers of Isocoma 

 ivi'ightii, two males, two females, in cop. (Ckll.) ; Phoenix, 

 Arizona, Oct. 7th, at flowers of Isocoma liartwegi, also rolling in 

 the dust, many males and females in cop. {Ckll.). Compared with 

 the typical (N. M.) form, the Arizona male has the face-markings 

 yellower, and the female has the dog-ear marks smaller, and the 

 clypeus often with rudimentary bars, thus approaching true 

 coloradensis. 



Xenoglossa patricia, Ckll., subsp. nov. angustior. 



3'. A little smaller and less stout, hind legs noticeably smaller 

 and more slender ; apical plate of abdomen narrower, and rounded at 

 the tip, like the end of a finger, instead of truncate. 



