572 Notes in 1887 upon lepidopterous larve, §c. 
“‘a dorsal row of larger teeth extending to the tail.” 
The author evidently recognises the significance of the 
characters, for he states that ‘an analogous and still 
more imposing form is found in the larve of the 
Phalene, belonging to the genus Ceratocampa.” The 
larva is also described by B. Clemens in his “ Synopsis 
of North American Sphinges” (‘ Journal of the Academy 
of Natural Science of Philadelphia,’ vol. iv., 2nd series, 
p- 97). This author also places Ceratomia next to 
Smerinthus, and speaks of “four thoracic fleshy granu- 
lated horns, caudal horn rather short, straight, and 
roughened” in C. quadricornis. This description con- 
veys an impression that the four thoracic horns and the 
caudal horn belong to one series, an impression not 
conveyed in Harris’s account. Both descriptions refer 
to the mature larva: it would be most important and 
interesting to have the ontogeny of this and other 
species of Ceratomia carefully worked out. I trust that 
some American lepidopterist will shortly undertake this 
work, or will send me living pupe of the species, which 
I believe to be quite common. It is interesting to note 
that the thoracic spines of Ceratomia follow Ceratocampa 
rather than Aglia, although the latter is Sphina-like in 
s0 many minute details. 
There is also the extremely interesting African 
Smerinthine larva, Lophostethus Dumolinii, described 
from Roland Trimen in Prof. Meldola’s Appendix to his 
translation of Weismann’s Essays (l.c., pp. 527—528). 
Spines are present on all segments except the 1st 
thoracic. The two dorsal rows of spines are the longest, 
and the longest of these are on the 8rd thoracic and 1st 
abdominal segments, thus differing from Ceratocampa. 
The caudal horn is shorter than the dorsal spines, but 
similar in structure, being covered with prickles. The 
other rows of spines are also present below the dorsal 
rows, but much smaller, as in many species of Cerato- 
campa. 
The condition of the young larva is most significant. 
The 1st thoracic segment (or head, but the former is 
almost certainly intended) possesses a pair of short 
dorsal spines. The other dorsal spines are much longer 
and bear prickles. The dorsal spines of the 2nd and 3rd 
thoracic segments and the caudal horn are longer than the 
rest, and the caudal horn longest of all; and all five 
