PiM. 6. XII. 1919. THECLA. By Dr. M. Draudt. 7C1 



Th. irus Godt. (153 h) is above unicolorously greyish-brown, beneath almost just the same as the irus. 

 preceding, more blackish-brown ; the transverse lines of both wings have a distal white tinge a the costal margin. 

 In the large, more southern form arsace Bsd. there appear reddish-lustrous spots before the anal part of the araace. 

 hindwings. Distributed in North America. The larva lives on the plum-tree. 



Th. mossi Ediv. (^ polios Cook <& TFateow) extremely resembles the preceding; beneath the marginal mossi. 

 area of the forewing is not brightened up, the dark basal area of the hindwing somewhat more extensive, distally 

 bordered by a fine white line which is often veiy broad so that it may grow to a band of the colom: of a grey- 

 horse of about 2 mm width; the distal part is more indistinctly marked. Widely distributed from 'New Jersey, 

 Ne\v Hampshire, Nova Scotia, Colorado, Canada, Vancouver. 



Th. henrici Groie <fe Rob. which was often disputed by American authors with respect of its right henrici. 

 of being regarded as a species, differs above by broad distal margins of a copper-reddish tinge; beneath the 

 blackish-brown basal part is sharply and very irregularly defined, often distally accompanied by a complete, 

 white line. From Maine to West Virginia, rather rare. The larva lives just like the preceding. — f . solatus Cook solaius. 

 tfc Watson from Texas has more uniformly coloured basal and marginal areas beneath, more chocolate-bro^^ai 

 and yellowish-brown, above less coppery lustre. 



Th. eryphon Bsd. (154 f) is above dark brown, on the hindwings in an anal direction warming into eryphon. 

 copper-brown, fringes white-speckled. Beneath red-brown, on the hindwings more lilac-brown with purple- 

 brown dentate lines, the proximal one bordered proximally by white, the distal one distally, with similar, small 

 marginal spots and, in front of them, pointed, proximally black triangular spots. Distinguishable from the 

 following, very similar species by the postdiscal being almost rectilinear on the forewing. California, Colorado. 



Th. niphon Hbn. (154 f) is above and beneath extremely similar, but on the forewings beneath, the niphon. 

 postdiscal projects sharply outside on the lower radial vein. The larva lives on pines. Nova Scotia to Colorado. 



34. Doly las- Group. 



Th. dolylas Cr. (150 e). Abo\e pale lilac-blue with very broad blackish-brown margins, in the (J dohjlas. 

 with a very large, deep rust-brown, black margined scent-spot in the centre of the forewing. Beneath white 

 towards the border yellowish with several bla^r^kish and brownish-yellow transverse markings. Widely distributed ; 

 from Guiana, Colombia, Bolivia, the Amazon. 



Th. spurius Fldr. (= dolosa Stgr.) (150 f) is above, except extensively lighter hindwings, with a spurius. 

 broad white costal margin and quite a narrow black distal margin, almost like the preceding, but it has no 

 small tail and the scent-spot seems to be throughout lighter brown. Colombia. 



Th. hypocrita Schs. (153 h) has neither a tail; above the blue is somewhat more extensive, the border hypocrita. 

 of the hindwing equally broad black. Beneath the proximal part of the forewing as far as the border is broad 

 blackish-brown, the costal base whitish, somewhat clouded in brown, the hindwings more yellow, the post- 

 discal and submarginal brown transverse lines are united analwards and terminate into the anal angle. ^Mexico, 

 Costa Rica. 



Th. ellida Hew. (150 e) resembles the preceding above, is darker lilac-blue with a broad black apex elUda. 

 of the forewing, rusty- yellow to brown fringes and without a scent-spot ; Hewitson describes such a scent- 

 spot, but I am unable to find it. The hindwing exhibits in front of the border, in an anal direction, 3 small 

 black spots. Beneath the 2 is like the preceding, the ^, however, much more variegated by the deep red-brown 

 of the bands and of the triangular basal spot of the hindwing. Venezuela to South Brazil. 



Th. malina Heiu. (150 e) resembles dolylas above, but it has quite a different scent-spot: the larger malina. 

 part in the cell is dark-brown, the smaller part placed obliquely above and distally from it is more greyish- 

 brown, the whole spot is surrounded distally by greenish-grey. Beneath brownish, towards the distal margin 

 reddish ochreous-yellow with several brown, narrow bands being convergent towards the anal end on the 

 hindwings. Brazil, Sao Paulo. 



Th. palegon Cr. (= myrtillus Cr., juicha Beak.) (150 d,e) is allied to the preceding species, above paUgon. 

 silky-glossy greyish-violet with much narrower margins and only a small, but likewise double scent-spot, the 

 $ dull greyish-brown. Beneath the distal margin is brighter rusty-yelloM^ the proximal surface dusted with 

 violettish-grey, the bands more dentate. From Mexico to South Brazil, common. 



Th. cyrriana Hew. (153 h) greatly resembles the preceding according to the figure and description; cyrriana. 

 above the black distal margin and apex are entirely absent, the small scent-spot is red-brown, the tail much 

 smaller. Beneath the wings are marked as in palegon, but quite brown, the hindwings darker clouded, without 

 the rusty-yellow border. Described from Peru. 



Th. nannidion Burm. is said to resemble above Th. lausiis (154 e) m size and colour: forewings nannidioyi. 

 brown, hindwings light-blue like there, the under surface is said to approximate that of palegon, but to be 

 lighter grey with fainter, posteriorly shortened, brown bands without the rusty- yellow marginal part. Imme- 

 diately recognizable by the very long, 3rd palpal joint. Argentina (Corrientes). 



V 96 



