The Origin of the Markings of Caterpillars. 243 



larvae with other species of Smerinthus furnish any 

 further information of importance. 



Of the genus Smerinthus, Latr., thirty species 

 were catalogued by Gray, 52 of which I am only ac- 

 quainted with the larvae of eight (five European, 

 and three North American). None of these in the 

 last stage possess a complete subdorsal line toge- 

 ther with oblique stripes. Neither, on the other 

 hand, do any of them show a more advanced 

 stage of development in having the red spots con- 

 stantly formed into coloured border-stripes. We 

 must therefore admit that they have all reached 

 nearly the same stage of phyletic development. 

 On turning to the doubtfully placed genus Calym- 

 nia, Boisduval, which is represented in Gray by 

 only one species, figured by Westwood 33 as a 

 Smerinthus, we first meet with an older stage of 

 development of the genus. 



The adult caterpillar of C. Panopus, from the 

 East Indies, possesses, in addition to the oblique 

 stripes, a completely developed subdorsal line, 



34 



32 " Catalogue of Lepidop." British Museum. [Butler 

 divides the subfamily Smerinthince into 17 genera, containing 

 79 species, viz. Metamimas, 2 ; Mimas ; 4 ; Polyptychus, 7 ; 

 Lophostethus, i ; Sphingonapiopsis, i ; Langia, 2 ; Triptogon, 23 ; 

 Laothoe, 2 Cressonia, 3 ; Paom'as, 2 ; Calasymbolus, 5 ; 

 Smerinthus^ 5 ; Pseudosmerinthus, 2 ; Daphnusa, 4 ; Leuco- 

 phhbia, 5 ; Basiana, 10 ; Ccequosa, i. R.M.] 



83 " Cabinet Orient. Entom.," p. 13, PL VI., Fig. 2. [Butler 

 places this species doubtfully among, the Sphingince. R.M.] 



84 "Catalogue of the Lepidop. Insects of the E.I. Co.," by 

 Horsfield and Moore. PL VIII., Fig. 6. 



R 2 



