C L I A S Leachiana. 

 LeacJuan Colias. 



Generic Character. — See PI. 5. 



Specific Character. 



C. alis subrotundatis, integris, virescenti-alhidis, anticis supra fulvis, viarginc 

 punctogue medio nigris, singulis subtus macula central iferrugined. En- 

 cycl. Method. 



(Male) wings slightly rounded, entire, greenish white ; anterior pair above 

 orange, at their tips, margin, and central dot black : each pair beneath 

 with a central ferrugineous spot. Female ■ ? 



C. Leachiana. Godart in Encj/cl. Method, vol. ix. p. 91. 



In size this insect is tlie largest of the genus yet discovered ; it 



was fiist noticed by Godart, who has given it the name of my 

 learned and valued friend, Dr. W. E. Leach, of the British Mu- 

 seum, whose talents are too well known to need any eulogium 

 in this place. 



It appears to inhabit both the northern and southern extre- 

 mities of Brazil ; for I have seen it in a box sent from Para, and 

 my specimens were captured in Minas Gcraes by my friend 

 Dr. Langsdorff. It is, however, a rare species ; for I have only 

 seen seven or eight specimens, and they were all males : the fe- 

 male, when found, will probably differ as remarkably as in most 

 of this genus. 



The opaque spot on the inferior wings above is very large ; 

 but the tuft of hair corresponding beneath the superior wings, is 

 entirely wanting. It should be likewise observed, that although 

 this insect in every outward respect resembles a genuine Colias 

 (the type of which may be C. Ebule), it differs very materially in 

 the terminal appendages of the abdomen ; the last joint being the 

 shortest, and scarcely pointed ; and the hook, instead of being con- 

 cealed beneath this segment, is exserted beyond it, and met by 



IM. (5. 



