Publ. G. XII. 1919. THECLA. By Dr. M. Draitdt. 7C1 



Til. irus Godt. (153 li) is above nnicolorously greyish-brown, beneath ahnost just the same as the irus. 

 preceding, more bhxckish-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 reddisji-histrous spots Ijcforc the anal part of the ar.iacc. 

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



Th. niossi FaIw. (= polios Cook d- ir«/.so») extremely resembles the preceding; beixeath the marginal itin^tii. 

 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 wliich is often very broad so that it may grow to a band of the colour of a grey- 

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

 New Hampshire, Nova Scotia, Colorado, Canada, \'ancouver. 



Th. henrici Gwte d.- Rob. which was often disputed by American autiiors with respect of its right hcnrlvi. 

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

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

 white line. From Maine to ^Vest Mrginia, rather rare. The larva lives just like tiie preceding. — f. solatiis Cook .solalii.s. 

 d- Watson from Texas has more uniformly coloured basal and marginal areas beneath, more chocolate-brown 

 and yello«ish-bro\\ n, above less coppery lustre. 



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

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

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

 marginal 8j>ots and, in front of them, jjointed, jji'oximally 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 i)idjects sharjjly outside on the lower radial vein. The larva lives on pines. Nova Scotia to Colorado. 



34. Dolylas-Group. 



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

 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 blackish and bio\\iiish-ycllow transverse markings. Widely distriliuted ; 

 from Guiana, Colombia, Bolivia, the Amazon. 



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

 broad white costal margin and cjuite a narrow blaclc 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 hyporrita. 

 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 Hev. (150 e) resembles the preceding al)ove, is dai-ker lilac-blue with a broad black apex cUida. 

 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 Hew. (150 e) resembles dolyl'is above, but it has cpiite a different scent-spot: the larger mnHna. 

 part in the cell is dark-bro«n, the smaller part ])laced 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 ochieous-yellow with several brown, narrow bands being convergent towards the anal end on the 

 hindwings. Brazil, Sao Paulo. 



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

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

 $ dull greyish-brown. Beneath the distal margin is brighter rusty-yellow, 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; ci/rridna. 

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

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

 the rusty- yellow border. Described from Peru. 



Th. nannidion Biinn. is said to resemble above Th. lausus (154 e) in size and colour: forewings nannidion. 

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

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

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



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