Hagen.] 108 . [November 27, 
and at least all I have seen, and all figured and described in Europe, 
possess a pair of filaments on each side of the third segment, I am 
inclined to believe that the second filament was overlooked by Mr. 
Walsh. This is the more probable as it is considerably smaller than 
the other one; and as the lens used by Mr. Walsh was an exceedingly 
poor one. 
Among the European species the larva of H. scalaris, well- 
known and often figured, is very similar, except that the filaments in 
the American species seem to be more feather-branched. But as I 
have only a few specimens of the European species before me and 
the existence of H. scalaris in America is proved by specimens in 
Prof. Loew’s collection, the identity of the two species is very prob- 
able. Nevertheless the larve of all related species are very much 
alike, and only by the study of a material with raised imagos can a 
sufficient surety be reached. As by far the largest part of the An- 
thomyide of the collection is still in the hands of Baron von Osten 
Sacken in Europe, I am not able to give a satisfactory record of the 
species of Homalomyia belonging to our fauna. 
‘The cases which I have to relate (begins the well-known Dr. 
Bateman in his account of the larvee of two species of insects discharged 
from the human body) do not possess any practical importance, and 
the only degree of interest that may be attached to them, must be 
derived from the uncertainty of medical records on the subject in 
question. This uncertainty induces me to bring them forward. For 
whether we consider, on the one hand, the difficulty of accounting 
for the origin of many of those animals, which make their nidus in 
the human boy, or the variety of indistinct and fabulous histories 
of such animals which have been detailed on the other, every in- 
stance of the existence of those which are not usually found there, 
but the species of which can be ascertained, and therefore the prob- 
able origin pointed out, seems to be worthy of being recorded.” 
These words are to-day just as true as seventy years ago, for really 
not much has been done to elucidate the origin of similar cases, 
except that the occurrence is more or less fully stated in medical 
periodicals. 
Rev. F. Hope published forty years ago a list of one hundred 
and eight cases, which he found recorded by different authors. Of 
them thirty-five belong to Coleoptera, two to Dermaptera, six to 
Lepidoptera, one to Neuroptera, sixty-four to Diptera. Among the 
Coleoptera the meal-worm, Tenebrio molitor, is recorded in nine 
