Insects. 3101 



lous spots : sides of anus bordered by a yellow line : thoracic legs pinkish orange : 

 prolegs green, tipped with pale violet, and a shining patch, half black and half 

 greenish yellow on each : stigmata black : abdomen green, with a dusky ventral line. 

 When young, they are altogether much paler : the pale spots and lines sometimes 

 hardly distinguishable. When about to undergo their transformation into pupa?, they 

 turn to a brownish lilac colour, tinged with green ; the dorsal and lateral lines gene- 

 rally disappear, and the longitudinal line, which joins the base of the horn, turns to a 

 bright pink colour : the small spots remain white. Two specimens were brought to 

 me from Mornez (Lausanne), on the 13th of June, 1847, corresponding in every re- 

 spect to the above description, excepting the stigmata, which were of the same colour 

 as the thoracic legs, and bordered by black. I have always found the larva of this 

 insect on the Galium Mollugo, which is found growing on old walls exposed to the 

 son, and it is against such walls that I have chiefly found the imago flying. Flies by 

 day. These are the only Macroglossae that I have reared from larvae. The next genus, 

 Pterogon, contains two species, one of which I have frequently reared, viz., the P. 

 (Enotherae. The curious larva of this uncommon insect is found during the months 

 of June, July, August and September, on the Epilobium hirsutum. The following is 

 the description of it : larva elongated, from two to two and a quarter inches in length : 

 head round : a round, shining spot, or ring, on the penultimate segment, in the place 

 of the horn of other Sphingides : very variable in colour. The back is generally thickly 

 spotted with black, or dark gray. The sides have generally a series of oblique, black 

 stripes, partly composed of black spots, one on each segment, and on which the stig- 

 mata are placed : stigmata orange-red and bordered by black, partly surrounded above 

 by light blue : the anal spot is of a shining yellow-ochre, bordered by deep brown and 

 with a shining dark brown pupil: the body is transversely wrinkled with dark gray: 

 head olive, gray, or green : escutcheon the same as head : thoracic legs pale grayish 

 white, tipped with brown ; prolegs vary according to the colour of the body, but 

 always tipped with brown or with dark gray : abdomen pale, and varying according 

 to the ground colour, and sometimes with a series of dusky spots down the middle : 

 the lower part of sides is generally more or less streaked with brown. When young, 

 they are generally green, covered with minute yellowish spots, with a pale yellowish 

 longitudinal line on either side of back: anal spot green : stigmata small, and light 

 orange: head green: thoracic legs pale yellowish green: prolegs green, tipped with 

 dark brown : abdomen green : the anal circular spot is rather elevated above the sur- 

 face of the body. This larva is difficult to rear, and appears like a little short ser- 

 pent. It sometimes eats the flowers of the Epilobium hirsutum. I have never found 

 it on any other plant, nor on any other species of Epilobium than the E. hirsutum. 

 Boisduval enumerates nineteen species as belonging to the genus Deilephila, some of 

 which I shall describe in the larva state, beginning with the D. Elpenor. The larva of 

 this species is found in July and August, feeding on the Epilobium hirsutum ; and 

 sometimes on the vine (Vitis vinifera). The caterpillar is elongated, and attenuated 

 anteriorly. The three anterior segments are extended or contracted, according as the 

 caterpillar is feeding, walking, or in a state of repose. When contracted they are drawn 

 into the fourth segment. When full grown the larva is about three inches long. The 

 head is small and globular : anal horn small : the ground colour varies from a fine 

 apple-green to dark brown, variously variegated with small dusky lines. The dark 

 individuals have much resemblance to the colour of the Spanish radish. The sides 

 of the fourth and fifth segments are each ornamented with a large oye-likc spot of a 



