APPENDIX. 475 



dorsal line becoming still more indistinct ; this line can now only be 

 recognised on the front three segments in a few individuals, whilst, 

 in the majority, it is completely absent ; sometimes the ferruginous 

 red spots on the oblique stripes now appear, but this character is 

 not completely developed till the 5th stage. Out of about 90 

 examples, in which I followed the entire development, only one 

 possessed such spots, and these were situated on both sides of the 

 6th segment. The third moult takes place after another period of 

 six days. Fourth instar : There is no change of marking from the 

 previous instar. Fifth instar % : The adult larva does not differ in 

 marking to any considerable extent from that of the preceding stages. 

 The first and last stripes do not appear larger than the intermediate 

 ones, as the latter now increase in size. Many specimens were 

 entirely without red spots, in others they were present, but were 

 small and inconspicuous, whilst in others again there were two spots, 

 one above the other, of a vivid ferruginous-red, these coalescing in 

 some cases, and thus forming one spot of a considerable size. I 

 have never seen these spots formed into a regular linear coloured 

 border to the white oblique stripes, as occasionally happens in the 

 larva of M. tiliae (Weismann, Studies in the Theory of Descent, transl., 

 pp. 236-239). 



Hemaris tityus, Linne (Vol. hi., p. 528). 



[Page 5 29. J Hemaris tityus var. alaiana, Roths, and Jord., " Revis. of 

 Sphing.," p. 451 (1903). Fuciformis, Grum-Grsch., " Rom. Mem. Lep.," iv., p. 514 

 (1890). — $ % . Black belt of abdomen much shaded with luteous hairs, tail with scarcely 

 any luteous hairs ; thorax and posterior abdominal segments less bright yellow than in 

 H. tityus. Border of forewing broader than in the other form, as broad between 

 R3 and M, as this cellule is wide at end ; crossveins with an obvious bar which is 

 nearly as prominent as in H. ajjinis ; base of hindwing above and below less 

 yellow than in H. tityus. A more generalised form than the ordinary H. tityus. 

 Hab : Alai Mts. In the Tring Mus. 1 3 (type), 1 ? , ex coll. Grum-Grschmailo 

 (Rothschild and Jordan). 



[Page 531-] Ontogeny of larva of Hemaris tityus. — First 

 instar (larvae hatched July 10th, 1902, described July 12th): The 

 larvae are somewhat grown in the first stadium 475mm. — 5-51x1111. 

 in length, rather stout and of uniformly cylindrical shape (similar 

 to a young Eumorphid larva). Colour white with a slight greenish 

 tinge, the body semitransparent-looking, a dark mass (probably food 

 in alimentary canal) within the body showing through the skin. The 

 most distinctive feature of the larva is the large and very widely 

 forked black hairs. Head rounded, bearing a few long black 

 tapering hairs with simple (not bifid) tips. The prothoracic scutellum 

 bears apparently simple tapering hairs which are, however, really 

 slightly notched, as also are the terminal setae on the caudal horn 

 (i of the 8th abdominal) ; all other dorsal and lateral hairs, with 

 the exception of the anal, and those on tubercle iv of the 7th 

 abdominal (which is pale in colour and simple unforked) are black 

 and widely forked, i.e., Y-shaped ; the setae spring from pale brown 

 chitinous tubercular bases. The dorsal tubercles i and ii of the 

 meso- and metathorax have their bases conjoined so as to form 

 an oval, twin, cone-shaped tubercle set obliquely to the median 



* Compare antea, vol. iii., pp. 478 and 479. Bacot's examples moulted 3, 

 Hellins' examples moulted 4, times. 



