AGRIADES THETIS. 333 



3a. — As in 3, but with blue scaling at base of forewings, on inner margin of 

 hindwings, and edging orange lunules externally = ab. salacia, Bergstr. 



16. — As in la, but with blue lunules or cuneaa, edging orange internally = ab. 

 caerideo-cuneata, n. ab. ( = thetis ? , v. Eott., in part). 



26. — As in 2a, but with blue lunules or cuneae, edging orange internally = ab. 

 cuneo-lunulata, n. ab. 



36. — As in 3a, but with blue lunules or cuneae, edging orange internally = ab. 

 cuneo-marginata, n. ab. 



lc. — As in 1, but with blue scaling of forewings extending beyond discoidal, of 

 hindwings over inner jmargin and centre of wing to orange lunules = ab. caeru- 

 lescens, n. ab. 



2c. — As in 2, but with blue scaling of forewings extending beyond discoidal, of 

 hindwings over inner margin and centre of wing to orange lunules = ab. caeru- 

 lescens-lunulata, n. ab. 



3c. — As in 3, but with blue scaling of forewings extending beyond discoidal, of 

 hindwings over inner margin and centre of wing to orange lunules = ab. caeru- 

 lescens-marginata, n. ab. 



Id. — As in 1, but with blue scaling of all wings extending to marginal band, 

 the nervures, costa, and outer margin only dark = ab. semiceronus, n. ab. ( — thetis 

 c? , v. Eott., in part). 



2d. — As in 2, but with blue scaling of all wings extending to marginal band, 

 the nervures, costa, and outer margin only dark = ab. ceronus-lunulata, n. ab. ( = 

 thetis <? , v. Eott., in part). 



3d. — As in 3, but with blue scaling of all wings extending to marginal band, 

 the nervures, costa, and outer margin only dark = ab. ceronus, Esp. ( = thetis $ , v. 

 Eott., in part). 



le. — As in 1, but with blue scaling extending over all wings to outer margin ; 

 costa and nervures also blue = ab. semicoelestis, n. ab. 



2e. — As in 2, but with blue scaling extending over all wings to outer margin ; 

 costa and nervures also blue = ab. subcoelestis , n. ab. 



Be. — As in 3, but with blue scaling extending over all wings to outer margin ; 

 costa and nervures also blue — coelestis, Obth. 



This is an awkward grouping, but it is difficult to combine a 

 number of different features in one insect in a succinct and simple 

 manner. There is, further, considerable variation in the development 

 of the discoidal lunules. The British examples do not show a discoidal 

 lunule on the hindwings. Eeverdin makes (in litt.) a similar observa- 

 tion concerning the Swiss specimens ; on the other hand, there are 

 many examples in the British Museum coll., from various localities that 

 do so ; there are two very pretty aberrations connected with the discoidals, 

 one in which they are cinctured with a white ring = ab. albicincta, n. ab., 

 the other with them surrounded with blue = ab. caeruleocincta, n. ab. 

 Occasionally, an entirely blue spot replaces the discoidal on the hind- 

 wings (caeruleopuncta, n. ab.). Of the racial ? forms, it is to be noted 

 that the bluest ? imnctifera, Obth., are almost identical with the 

 earliest figure of ceronus. Esp., whilst alfacarensis, Eibbe, is merely a 

 well-defined form of marginata, Tutt. The thetis of von Eottemburg, 

 puzzled all the older lepidopterists since he described the bluer £ s 

 with well-defined orange lunules on the hindwings, and ill-defined 

 lunules on the forewings, as $ thetis, including also those 2 s in which 

 the blue was more restricted (see antea p. 326), and the 2 s entirely, 

 or almost entirely, without blue scales, he described as 2 thetis, whilst 

 he then describes the real $ as bellargus. Esper was also much 

 muddled over thetis, v. Eott., and figured (Schmett. Eur., i., pi. xxxii., 

 fig. 2) one of the blue £ forms of Polyommatus icarus under this name. 

 This figure was copied by Bergstrasser (Xom., iii., pi. liii., figs. 3-4), 

 who, however, whilst referring it to thetis, Esp., renamed it oceanus ; 

 later, however, by reference (op. cit., p. 35), he named his pi. lv., figs. 

 5-6, representing a quite different form of Polyommatus icarus, thetys. 



