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EXTRACTS FROM CORRESPONDENCE. 
On some of the Insects described by Walsh. 
According to the Bibliography of Economic Entomology, pp. 373, 374, the types of 
Heptagenia maculipennis Walsh, Conotrachelus crategi Walsh, and Anthonomus prunicida 
Walsh, were destroyed. If you know of any collection in which there are specimens 
of these species determined by Walsh, please give me the number of specimens. Any 
information concerning the following insects will be very thankfully received: 
Caloptenus differentialis Uhler MS. 
Xiphidium longicaudum Walsh MS. 9 @. 
Orchelimum arboreum Walsh MS. g=glaberrimum? Burm. 
(canthus bipunctatus g 2 (2? only described). 
Platamodes illinoiensis Walsh MS. 
These names are copied from the labels of some specimens in a collection of insects 
presented to the Illinois Wesleyan University in about 1863 by Dr. Walsh. Some of 
them are now in very bad condition. * * * [Charles C. Adams, Illinois, March 
27, 1892. 
REPLY.—* * ~*~ Typical specimens of Walsh’s Heptagenia maculipennis are appar- 
ently not preserved. Walsh described the species from fifteen specimens (Proce. Ent. 
Soc. Phila. 11, 1863, p. 206), and I can not understand why it is that he never sent speci- 
mens either to Dr. Hagen or to myself. Dr. Hagen apparently never referred to this 
species, and it remained also unknown to Mr. Eaton in his Monograph of the Ephem- 
eride. 
Typical specimens of Conotrachelus crategi and Anthonomus prunicida, compared 
with Walsh’s types, and some of them from him, are in my own cabinet. Moreover, 
there are in the Le Conte collection, now at Cambridge, Mass., specimens of both 
sexes, which were sent by Walsh to Dr. Le Conte. These are, in all probability, 
typical specimens, but so far as I remember they are not labeled as such. 
Caloptenus differentialis Uhler MS. is no doubt the species subsequently described 
by Thomas and now known as Melanoplus differentialis Thos. 
Xiphidium longicaudum and Orchelimum arboreum have never been described or even 
mentioned by Walsh in his writings; therefore of no particular value. The former 
is possibly the species referred to by Walsh in Proc. Ent. Soc. Phil., Vol. 11, 1884, p. 
581, but it can not be identified in the absence of Walsh’s original specimens. 
Orchelimum arboreum Walsh MS. has likewise never been described, and appears to 
be the ‘‘Orchelimum, perhaps glaberrimum Burm.,” mentioned by Walsh, l. ¢., p. 232. 
(Ecanthus bipunctatus. If Walsh did not make a mistake in the determination, this 
may be Mc. bipunctatus De Geer, but from McNeill’s ‘‘ List of the Orthoptera of Ili- 
nois,” I see that it is very rare in Illinois, and thus the probability is that Walsh’s 
specimens must be referred to some other species. 
Platamodes illinoiensis Walsh MS. I fail to find any reference to this name in 
Walsh’s writings, and the species can not be identified. It is possibly Ischnoptera 
 pennsylvanica De Geer or I. unicolor Scudd., since it must be assumed that Walsh was 
familiar with the cosmopolitan species of Blattide occurring in Illinois.—[March 
30, 1892. ] 
A Chalcid Fly in anew Role; Is it parasitic on the Clothes Moth ? 
I send specimens of an insect that has been troubling a patient of mine, Mrs. Sum- 
ner Bull. Some three years ago she first noticed them and since they first made 
their appearance they have continued to infest the house, and by their buzzing and 
biting have kept her and her guests awake nights. They bite very quickly and fly 
away; the bite is not as troublesome as that of a mosquito, but is very much like 
that. Their buzzing is very similar to a mosquito. I hope that you may be able to 
classify the specimens sent and tell us what to do to get rid of them. They have 
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