Publ. 6. XII. 1919. THECLA. By Dr. M. Dratjdt. 753 



19. Ematheon-Group. 



Th. ematheon Cr. (149 d,e) is an extremely rare species of which only 2 specimens have become ematheon. 

 known hitherto, and most peculiarly from Surinam and Peru, so that it is certainly a very widely distributed 

 animal. Above deep-blue, on the forewing in the disc a purple-violet reflection with a very large black discal 

 spot; distal margin narrowly black. Beneath, the black ground exhibits white and brown irroration. 



Th. busa Godm. <£• Salv. (149 d) is above somewhat similar, deep-blue, in the disc a purple reflection, hum. 

 in which the large black cell-spot is situated; the margin is somewhat broader black. Beneath dark brown 

 with silvery-grey transverse speckles being united to broad areas behind the middle. From Mexico to Costa 

 Rica. 



Th. perpenna Godm. & Salv. (149 e) from Panama is much smaller and of lighter colours Avith a 7'erpenna. 

 broad black apex of the forewing and a smaller discal spot without the spot at the cell-end. 



Th. undulata Hew. (149 e). Above lustrous green like viridicans (149 f ), without the scent-spot, beneath undulata. 

 marked almost just like busa, but lighter brown. The $ is above a little duller and bluer with broader blackish- 

 brown margins. Lying before me from Colombia and Brazil (Itaituba). 



20. Tolmides- Group. 



Th. tolmides Fldr. (149 a) is allied to the. preceding group and forms the transition to the aegides- Mmides. 

 group. Above lustrous blue with moderately broad black distal margins. In the black anal part of the hindwing 

 we notice the beginnings of a blue marginal line. Beneath greyish-brown with very similar linear markings 

 like those of the following group, in the basal part darker. The nomenclatural type occurs more to the south 

 than the form hyas Godm. & Salv. (149 b) from Mexico, Guatemala, Costa Rica and Panama. The ^ of it has Tiyas. 

 above much narrower black margins and is beneath more chestnut-brown, the linear markings are less distinctlj' 

 prominent. 



Th. danaus Fldr. (149 b) likewise closely approaches to this type, though it might also better form danaus. 

 a group for itself. Above more greenish-blue. Beneath blackish-grey with-bluish-white linear markings: on the 

 forewings only one oblique, bent line behind the cell, the margin somewhat darker; the proximal Ime of the 

 hindwing is removed inwards in the broad subcostal area, the distal one gets jaggy towards the anal part, the 

 space between it and the somewhat darkened margin is slightly dusted in whitish. The anal lobe is split off 

 like in the lisus-growp. Colombia, Bolivia, Peru. 



Th. tityrus Fldr. (149 b) is above radiantly greenish-blue, the broad black margin sharply defined, fitynis. 

 Beneath brown; on the forewing 2 white postdiscal lines, disappearing in the whitish proximal margin, the 

 proximal one forms proximally an acute angle in the submedian area, the distal one is a little broader. Hindwing 

 before and in the centre with 2 white lines, the latter forms at the proximal angle a distinct W. then the costal 

 margin up to the lower median vein is followed by a coherent band of a magnificent deep carmine colour, on 

 both sides bordered by white, next to it between the median veins a black spot; in front of the border yet 

 a fine white line. Lying before me from Colombia, from the Rio Negro. 



Th. appula Heiv. (149 c) which we include here is apparently very rare; it is compared with danaus appula. 

 by Hewitsox, but it differs greatly from all those known, exhibiting also resemblances to pJioenissa (152 e) 

 or havila (148 b). Before me is also a $ which is above duller blue than the ^ which exhibits a small black 

 scent-spot in the upper cell-corner, with broader black margins. Beneath light brown, the space between the 

 two proximal white lines somewhat darkened, behind it extensively dusted in whitish. Colombia, Venezuela 

 and Bolivia. 



21. Aegides- Group. 



Th. aegides Fldr. (148 h) is above blue with rather broad black margins without a sexual spot; aegides. 

 in front of the border of the hindwing is, particularly distinct in an anal direction, a bluish-white line; fringes 

 orange-brown; the $ is of somewhat duller colours. The under surface is cinnamon-red with 3 fine bluish-white 

 transverse lines proceeding on the forewing from somewhat thicker and more purely white costal spots; on the 

 hindwing, close before the border, there is a fourth, similar line; anal lobe black interspersed with cumamon- 

 brown scales; above it the proximal margin is somewhat sinuous and here there is a thicker white spot. Vene- 

 zuela, Colombia. — form, amplitudo Drc. (149 b) has only half as broad black margins and a violet tmge m ampUtudo. 

 the blue; it is the form flying in Ecuador. — On the contrary, the form flying more to the north in Central 

 America (Mexico and Guatemala), furina.God7n. <& Salv. (148 h), has much broader distal margins and a darker. /»)•;««. 

 more blackish-brown under surface. 



Th. cyda Godm. <&; Salv. (148 h) resembles barba (149 a) above by the very broad black distal cyda. 

 margins and the lustrous blue colour; beneath it scarcely differs from aegides; both sexes are equalh- coloured. 

 Costa Rica. 



V 95 



