794 THECLA. By Dr. M. Dratjdt. 



91. Critola-Group. 



criiola. Th. critola Heiv. (157 i) is an entirely isolated animal. Above lustrous ultramarine-blue with narrow 



black margins and a large black scent-spot. Beneath grey with brown transverse dashes, behind them on the 

 forewings with a rusty-brown band and on the hindwings a chain of light-yellow small spots bordered distally 

 by brown; the two small anal spots are yellow bordered above by brown. Mexico. 



92. Hesperitis- Group. 



hesperitis. Th, hesperitis Btlr. (= cabiria Hew., perdistincta Kaye) (157 i) is above black-brown, only on the 



hindwings beginning from the lower radial vein towards the proximal margin there is a blue sprinkling with 

 a red spot in the anal lobe. Beneath brown, at the proximal margin of the forewing a little lighter ; on the forewings 

 an almost straight, darker brown, distally somewhat lighter tinged postdiscal line as far as the lower median 

 vein, before the border an indistinct, darker line. On the hindwings the postdiscal line begins with a small spot 

 being a little distally inclined; this line is black with a distal white tinge and, towards the proximal margin, 

 proximally sometimes strewn with orange; the angle of the W, resting on the lower median vein does not reach 

 so far towards the margin as the anal one ; anal spot black, the spot of the tail copper-red with a black triangle 



luguhris. in it, between both white dusting on a black ground. — In more southern specimens, = lugubris Mschlr., the 

 spot of the tail is more brown. Most widely distributed from Mexico to Brazil. 

 aruma. Th. aruma Hew. (157 i) looks very much like the following above, but it differs by the broader black 



distal margin of the hindwings. Beneath it is marked like the preceding; the red colour at the anal spots is 

 either absent altogether or it is just as extensive as in hes-peritis. Guiana to Brazil. 



camissa. Th. cattiissa Hew. (= vespasianus Btlr., chariclorus Btlr.) (157 k) is above magnificently ultramarine- 



blue with a violet lustre, the apex broadly black, on the median projecting pointedly towards the base. Distal 

 margin narrowly black, the costal area of the hindwing broadly black. The under surface olive-yellowish, lustrous ; 

 marked as in hesperitis, the red spot of the tail reaches as far as or almost as far as the discal side of the W. 

 Guatemala to Peru. 



simasca. Th. simasca sp. nov. (157 k) differs from the preceding above by the increased blue colour being situate 



only below the lower median vein, the inner-marginal vein remains broadly black; on the hindwings there 

 are only towards the anal angle some violet scales. Beneath there is no difference. Colombia (Rio Negro). 



{/cdrosia. Th. gedrosia Heiv. (157 k) is above blackish-brown, both wings towards the base with a deep violet- 



blue tinge. Beneath dark-brown, marked as hesperitis, the black of the postdiscal line more intense, the W 

 more uniform, distinguished by the very large, red anal spots; in the surroundings of the spot of the tail there 

 is on both sides extensive whitish dusting. Amazon. 



devia. Th. devia Mschlr. seems to be very closely allied to the following. On the upper surface the forewings 



are blackish-blue, the hind\^ings lighter blue. The ground-coloiu- beneath is grey-brown, the marking as in 

 xeneta, the 2 red-yellow anal spots distinct. Length of forewings: 13 mm. Sm'inam. 

 xeneta. Th. xeneta ii^ew. (157 k)isabove dullgreenishindigo-blue, the forewings towards the margin with a bright 



ultramarine-blue reflection; the under surface is sooty blackish-brown, with the same markings which are 

 distally somewhat lighter tinged and grow somewhat more purely white only with in the scope of the W; in 

 the northern, mostly a little lighter specimens some deep red-brown becomes visible at the anal angle, dis- 

 appearing entirely in the sooty-black area in more southern specimens. From Guatemala to South Brazit 



vartunda. Th. partunda Hew. (= origo Godm. d; Salv.) (157 k) is of a deeper, more intense blackish-brown, on 



the hindwings the metallic-blue spot extends close to the base. The under surface is lighter, the anal spots 

 with a broad red margin. Panama to the Amazon. 



viiruvia. Th. vitruvia Heiv. (157 c) seems hitherto to be known tjrpically in but one specimen. Forewings black, 



at the proximal margin broadly ultramarine-blue, hindwings not metallic blue, at the distal margin broadly 



blackish-brown like at the costal margin. Beneath like the preceding, but the spot of the tail is not red, but 



foriuna. dark-brown. The type originates from Para. — fortuna Drc. is above and beneath the same, but the spot of 



torqueor. the tail is bordered by red. Peru, Amazon. : — torqueor Drc. is above somewhat lighter blue, this colour on the 



indigo, forewing reduced, beneath like fortttna. From Brit. Guiana. — indigo Drc. has above on the forewings only 



a narrow blue stripe at the proximal margin and is beneath coloured as vitruvia; this form from Brazil is con- 



anfrada. siderably smaller. — anfracta Drc. has above one-coloured greenish-black forewings, for the rest like the type. 

 Described from Peru. 

 ihama. Th. thama Hew. (158 a) is smaller and above very lustrous metalHc-blue, more greenish than xeneta, 



the costal margin of all the wings very broad, the distal margin narrowly black. Beneath somewhat lighter 

 than the said species, about as partunda with bright red spots, also the W is beneath filled up with red and 

 proximaUy bordered the same. Panama to Colombia. 



