436 Studies in the Theory of Descent. 



if, from those genera of which the larvae are known, 

 we may draw a conclusion with reference to their 

 allies. I am acquainted with larvae of genus 2, 

 Agraulis, Boisd. (Dione, Hiibn.); of genus 3, 

 Cethosia.) Fabr. ; 10, A fella, Doubl.; 12, Argynnis, 

 Fabr. ; \^Mclitcea? Fabr.; 19, Araschnia^ Hiibn.; 

 22, Vanessa^ Fabr. ; 23, Pyrameis, Hiibn. ; 24, 

 Jimonia, Hiibn. 131, Ergolis, Boisd.; 65, Hypo- 

 limnas, Hiibn. (Dtadema, Boisd.) ; 77, Limenitis^ 

 Fabr. ; 81, Neptis, Fabr. ; 82, Athyma, Westw. ; 

 and finally with those of genus 90, Euthalia, 

 Hiibn. which, according to Horsfield's figures, 

 possess only two rows of spines, these being re- 



* [The larvae of genera 14, Phyciodes, and 35, Crenis, are 

 likewise spiny. See Edwards' " Butt, of N. Amer." vol. ii. 

 for figuies of the caterpillar of Phyc. Tharos ; for notes on the 

 larvae of Crenis Natalensis and C. Boisduvali see a paper by 

 \V. D. Gooch, " Entomologist," vol. xiv. p. 36. The larvae 

 of genus 55, Ageronia, are also spiny. (See Burmeister's figure 

 of A. Arethusa, " Le*p. Rep. Arg." PI. V. Fig. 4). The larvje of 

 genus 98, Aganisthos, also appear to be somewhat spiny (see 

 Burmeister's figure of A. Orion, loc. cit. PI. V. Fig. 6), and this 

 raises the question as to whether the genus is correctly located 

 in its present position. The larvae of the following genera figured 

 in Moore's "Lepidoptera of Ceylon," parts i. and il, are all 

 spiny: 6, Cirrochroa (PI. XXXII.); 7, Cynthia (PI. XXVI.); 

 27, Kallima (PI. XIX.) ; and 74, Parthenos (PI. XXIV). Many 

 species of caterpillars which are spiny when adult appear to be 

 spineless, or only slighty hairy when young. See Edwards' 

 figures of Melitaa Phaeton, Argynnis Diana, and Phyc. Tliaros 

 (loc. cit.) and his description of the larva of Arg. Cybelc, " Canad. 

 Entom." vol. xii. p. 141. The spiny covering thus appears 

 to be a character acquired at a comparatively recent period in 

 the phyletic development. R.M.] 



