29 
' facility backward or forward, either side up. If provided with some support at 
one side it was possible for it to travel by means of the legs on its dorsal surface 
alone.” 
During the present season an example of a similar larva has come to my 
notice, specimens being first observed by Prof. L. H. Pammel, occurring in the 
stems of Helianthus. Their possessing similar locomotive organs upon the back 
called to mind the peculiar larvee noticed years ago. They differ, however, some- 
what in colour as well as in the plant on which they occur, and I find that they 
attacked voraciously dipterous larvae that were living in the same stems. 
Whether they are normally carnivorous remains of course to be determined, but 
there can be no question of their attacks upon these larvee, and apparently with 
the intention of obtaining food from them. These specimens are of a light bluish 
colour, possessing pro-legs upon segments 4-9, inclusive, and a pair of tubercles 
on the ventral portion of the anal segment, as well as a dorsal tubercle on the 
terminal portion of the same segment. In general appearance there is a striking 
resemblance to the Langwria larva, as shown in figure exhibited by Dr. Weed, 
but in his drawing there is no indication of the dorsal feet. 
The Club convened at 5 p.m., and considered the following resolution :— 
Resolved, That it is the sense of the Club that the meetings of the Association of Economic Entomo- 
logists and of the Entomological Club would both be benefited by holding such meetings, if possible, at 
the same time and place as the meetings of the American Association for the Advancement of Science. 
After discussion by Messrs. Fletcher, Osborn, Cook, Alwood, Weed and others, 
the resolution was unanimously adopted. 
The Secretary read a paper by Prof. D. S. Kellicott, of Columbus, O., upon 
the “ Preparatory Stages of Hustrotia caduca.” He had collected the larva upon 
Nuphar advena at Rives Junction, Michigan, in 1876. From these he had bred 
a moth, afterwards named by Mr. Grote #. caduca in the Canadian Entomolo- 
gist, Vol. 8, p. 207. During July of the present year he had again collected the 
insect at Corunna, Michigan, and had succeeded in breeding and describing all the 
stages, which were submitted herewith. 
The larvze found in 1876 were feeding in the fruit but those studied during 
this summer were found upon the leaves. If these latter were floating; the larve 
were exposed on the upper surface, in other cases they were beneath or concealed 
in folds. A different habit of swimming to that of Arzama obliquata, which 
progresses by horizontal undulations, was noted. #. caduca swims strongly, but 
by an entirely different motion. The postericr third of the body is bent down- 
wards like the tail of a crayfish and then quickly pushed backwards, thus driving 
the insect ahead by jerks. 
Discussed by Messrs. Weed, Webster and others. 
Prof. Cook reported having bred Agrotis C-nigrum through all its stages 
upon black currant, the eggs having been laid in a cluster upon leaves of that 
plant on 1st June—the perfect insect appearing on the Ist of August. 
Prof. H. Osborn read a note on the “ Period of Development in Mallophaga.” 
The habits of the species of Mallophaga render accurate observations upon the 
time required in development of the eggs a matter of considerable difficulty. 
While in some of the species upon very common birds it is possible to get an 
abundance of material, in other cases the opportunities for obtaining such mate- 
rial are very rare. But in the most common species the difficulty of determining 
the exact time of deposition of eggs, and then of keeping individuals in such 
conditions as to insure a normal development, makes positive observations diffi- 
cult. This being the case, any observations which may add to our knowledge of the 
subject seem of interest, and the present note is offered as one such contribution. 
