(•-171.) 



The genus Polyptychus, though comprising homogeneous material, is so much 

 diversified tliat it will have to be divided up when the Alricuu lauiia is hetter 

 known. Two Oriental genera {Ikiphnusn and Mariimba) are derivations from this 

 Aethiopiau and Indo-Malayan genns I'ob/ijt;/chi(s, while tlie other modifications 

 are all Aethiopian. 



Key to the genera : 



a. Midtibia with spines, at least at end . 



Midtibia without spines 

 h. Two pairs of spurs to hindtibia, with 

 frenulum ..... 

 Two pairs of spurs to hindtibia, 

 without frenulum .... 

 One jiair of spnrs to hindtibia . 

 c. No paronychium .... 

 With paronychium, no pulvilhis 

 With paronychium, with pnlvillus . 

 (I. Hinder angle of forewing not indi- 

 cated, the wing evenly rounded 

 from base to near aj)ex 

 Hinder angle of forewing at least 

 indicated ..... 

 e. Forewing with a broad pale yellow 

 streak from base to apex . 

 Forewing without such a streak 



f. Hindwiug j'ellow, red, or pinkish grey, 



with large black basal patch 

 Hindwing not so; jialpus small, rough 



with hair-scales, joint not open 

 Hindwing not so ; palpus not rough 



with hair-scales, joint open ; or 



distal margin of forewing even 



g. Joint of palpus not open ; long ter- 



minal spur of hindtibia obviously 

 shorter than first tarsal segment . 



Joint of palpus open ; long terminal 

 spur of hindtibia obviously shorter 

 than first tarsal segment 



Joint of ])alpns open ; long terminal 



spur of hindtibia as long as first 



tarsal segment .... 



h. Foretibia ending in a prominent tliorn 



Foretibia not ending in a thorn 

 i. Wings red and green 



Wings not red and green ; antenna 

 pectinated ..... 



Wings not red and green ; antenna 

 not jjectinated .... 



* Only iiidw-ia. 



b. 



in. 



LXI. Plii/lloj-'iphla. 



e. 



LIX. Leiicopklebia. 

 ■ . /• 



LVI. Pseudoclauis. 

 LXXVIII. Mimas. 



■ 9- 

 LV. Clanis. 



LX. Polyptychus. 



LXVIII. Acanthosphinx. 

 i. 



■ :/■ 

 LXXI. Rhodoprasina. 



LXVII. Ceridia. 



LXIV. Marumha* 



