156 
ea Yoeea 1. 
CAMBRIDGE, MASS., MARCH 1881. 
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PROCEEDINGS OF SOCIETIES. 
CAMBRIDGE ENTOMOLOGICAL CLUB. 
Lipp Shoe a I 
Scudder called attention to a recent paper by 
Dr. F. Eugen Geinitz (‘‘Die Blattineen aus 
der Dyas von Weissig”) being a new and 
extensive description of a very complete fos- 
sil cockroach. Especial attention was called 
to the want of symmetry in the venation of 
the wings. Mr. 
10 Dec. 1880. — 72nd meeting. 
Scudder then exhibited a 
drawing of a new (undescribed) cockroach 
recently found at Mazon Creek, IIl., which 
was even more complete than the one studied 
by Geinitz. This specimen also shows con- 
spicuous difference in the venation of the 
wings of both pairs. 
Mr. Scudder also called attention to another 
paper by Dr. Geinitz, which was, he said, 
the first considerable paper that had hitherto 
appeared, so far as he knew, on fossil insects 
of the Lyas of Germany. Dr Eau: 
Mark gave a synopsis of the results already 
arrived at by Dr. Manson (of Amoy). Lewis 
(of Calcutta), and others concerning the 
history of the parasite of the human blood 
known as Filaria sanguis-hominis, and the 
probability of a certain mosquito (Culex) 
wor CAL. 
being the intermediary host which harbors 
the worm in certain stages of its develop- 
ment. The figures accompanying the papers 
by Drs. Manson and Lewis were exhibited. 
Mr. W: Trelease referred to Mr. HC. 
McCook’s report printed on p. 183 of Prof. 
Comstock’s ‘* Report upon Cotton Insects.” 
Mr. Trelease could not quite agree with Mr. 
McCook in attributing so insignificant an 
importance to the ants. He (Trelease) had 
repeatedly lost in a single night the contents 
of boxes holding a dozen or more larvae of 
lle¢fa trom the invasion of the ants in ques- 
tion. Mr. T. is now quite sure that the 
moths (AZefa) seek the extra-floral glands 
on the peduncle of the sweet potato plant 
[ Zpomoea batatas| for food. He did not state 
the fact in his report to Prof. Comstock be- 
cause at that time he was not quite sure that 
such was the case. 
HOMOLOGIES OF THE CREMASTER. 
In the Comptes Rendus tor 16 Aug. 188o, 
Kiinckel homologizes the whole cremaster of 
the butterfly chrysalis with the anal prolegs 
of the caterpillar; the cremaster is formed, 
he says, by the soldering of a pair of appen- 
dages, bearing at tip, each independently of 
the other, a series of hooks; and these two 
parts can be seen. in a changing chrysalis, 
to be hidden under the skin of the anal legs 
of the caterpillar. Riley however has clearly 
shown (Amer. entom., July 1880, v. 3, p. 162— 
167) that the body of the cremaster of the 
chrysalis corresponds to the anal plate (or 
terminal segment) of the caterpillar, and 
that the anal prolegs of the latter are trans- 
formed to what he terms the sustentors. rid- 
ges on the under surface of the cremaster 
which terminate anteriorly in little knobs, 
and play such an important part in the pupa- 
tion of nymphalidous butterflies. Kiinckelhas 
evidently been led astray in part by the mere 
resemblance between the hooks of the pupal 
cremaster and those of the larval prolegs; 
and what becomes of the anal plate of the 
caterpillar he fails to tell us. Both these au- 
thors have written independently. S$: HS. 
