Hagen.] 248 [November 6, 
6. Mantispina. 
Mandibles short, straight, approximated; antenne longer; body 
elongated, slender; two claws with pulvillus. 
7. Coniopterygina. 
Mandibles short, straight, covered by the upper lip; antenne 
longer ; body elongated ; two claws with pulvillus. 
Examining these subfamilies in regard to the principal characters, 
we have the following result : — 
1. Mandibles. Covered by the upper lip in Coniopterygina, free 
in all the other genera. Toothed inside in Myrmeleonina; without 
teeth in the others. Arcuated inwardly in Myrmeleonina, Nemop- 
terina, Hemerobina; arcuated outwardly in Osmylina, Sisyrina 5 
straight, approximated in Mantispina, Coniopterygina. 
2. Antenne. Shorter than the mandibles in Myrmeleonina, Nemop- 
terina, Osmylina; longer in the others. 
3. Legs. Tarsus connected with the tibia in the hind legs in 
Myrmeleonina; free in all others. One claw in Sisyrina; two in all 
others. No pulvillus in Myrmeleonina, Nemopterina, Sisyrina; pul- 
villus more or less developed in all others. 
Perhaps this notice may induce American Entomologists to give 
more attention than heretofore to this interesting subject, and to try 
to discover the immature states of the American genera. Mr. F. G. 
Sanborn has raised the imago of Meleoma from the cocoon. The 
nympha skin and the cocoon are alike in Chrysopa. The discovery 
of the larva of Polystoechotes would be a good step forwards, and 
could not be difficult if imagos are kept in confinement. Several 
other genera belonging to America would, perhaps, advance our 
knowledge in an interesting manner, if the larvee were known. 
November 6, 1872. 
The President in the chair. Twenty-four members present. 
Dr. Kneeland gave an account of his recent visit to the 
volcanoes of the Sandwich Islands, the active craters of 
Mauna Loa and Kilauea on Hawaii, and the extinct crater 
of Haleakala on Maui. 
