426 BEITISH BUTTEKFLIES. 



colour, the development of the white patches on the outer part of the 

 discal area of the wing, and as different from typical pseudargiolus as 

 is sikkima from our European argiolus. Chapman writes (in lift.): — 

 " Gozora is one of the most surprising forms of C. argiolus. The 

 appendages are typical argiolus. The upperside is very like that of 

 C. dilectus, a very pale blue, with a large area of the forewing, and a 

 larger of the hindwing, white. The underside, also, has the discal 

 row of spots not typical of argiolus ; they are nearer the margin, large 

 and blurred, and the costal one is also further out. One wonders how 

 so much change in appearance can occur with no difference in the 

 ancillary appendages. It is clearly a highly-developed summer or 

 tropical variation, possibly it has seasonal forms, some nearer in colour, 

 etc., to typical C. argiolus" Godman and Salvin note (Biol. Centr.- 

 Amer., ii., p. 104) that gozora is the Mexican and Central American 

 form of pseudargiolus, which it closely resembles in the markings of 

 the underside, but it differs in the tint of the blue of the upper-surface, 

 which is considerably darker and more violet ; moreover, the $ has a 

 distinct whitish discal patch; in specimens from Costa Eica and the 

 State of Panama this patch is not nearly so clearly shown nor so 

 constant. In Guatemala gozora is very common in the highlands, 

 especially in the neighbourhood of Duenas, where numbers may be 

 seen on a sunny morning in the rainy season flying round wet places 

 on the roadside. 



s. var. argentata, Fletcher, " Can. Ent.," xxxvi., p. 127, fig. (1904). — 

 Differs from neglecta, by which name it has usually been known, by the collectors 

 of Manitoba, in having the black marks of the underside less distinct ; in some 

 specimens these are almost entirely obliterated, so as to present a clear, nearly 

 unspotted, surface of silvery- white. The illustration given herewith does not 

 quite represent the colour of the underside, rather too much of the red pigment 

 having been used, which gives it a warm tint not seen in nature. The shade of 

 blue of the upper surface in both sexes is, as a rule, paler than in other forms (or 

 varieties) of pseudargiolus. In the females the discal area of primaries is silvery- 

 white, with a blue reflection and a more decided flush of blue at the base. 

 Described from 18 specimens (12 males and 6 females) collected at Cartwright and 

 other places in southern Manitoba, as well as in south-eastern Assiniboia. The 

 types of both sexes are deposited in the U.S. National Museum at Washington. 

 This beautiful variety is the prevailing form of the common Spring Blue Butterfly 

 in Central and Southern Manitoba, where it has usually been named by collectors 

 var. neglecta (Fletcher). 



This appears to be, so far as the description of the upperside is 

 concerned, a specially pale ? form of neglecta, although Scudder notes 

 the $ s of the latter as having " the middle and whole of the outer 

 portion of the usual violaceous space of the forewings pale, with 

 scarcely a violaceous tinge, and the middle area of the hindwing almost 

 white," whilst he describes the spots of the underside as " usually mostly 

 obliterated," neither character, of course, agreeing with Edwards' 

 original description of neglecta. Fletcher notes it as the prevalent 

 form of the common "spring blue" butterfly in central and southern 

 Manitoba, but, although not so stated, one suspects it to be the 

 summer form. It is to be noted tbat, in the Palaearctic forms, the 

 imagines of the summer emergences are often much more sparsely- 

 spotted on the underside than are the spring forms. In this respect 

 var. argentata approaches the extreme ab. obsoleta-lunulata (infra). 



t. ab. obsoleta-lunulata, n. ab. Marginata ab., Edw., "Butts, of Nth. Amer.," 

 ii., Lye. pi. ii., fig. 22, p. 10 (1884). — A ? , reared from an egg laid by pseudargiolus, 

 the chrysalis having been laid on ice for seven days, the butterfly emerging in 31 



