239 



with boils. These contained larvte. Dr. Matas pictured a differently shaped grub 

 from that found by Dr. Freeman, in that the Central American one has a large head 

 and diminishes rapidly towards the caudal end. 



In describing Dr. Freeman's grub, he mentions twelve rows of curved black bristles 

 pointing backwards, which he called ciliated epithelia. At the caudal end the three 

 first rings had several pads of these bristles. Dr. Freeman supposed that the maggot 

 propelled itself by their aid. Dr. Matas depicts the same sort of bristles and considers 

 their use to be to keep the grub stationary. He also speaks of the necessity of the 

 maggot's obtaining air. Dr. Freeman's lived five months without it. 



Dr. Freeman supposes his grub to be the larva of a gad-fly, as the sting of these 

 insects is very annoying to both horses and human beings in McKean County. It 

 closely resembled, except in being narrower in proportion to the length, the grub 

 figured on page 214 of Vol. 1 of Insect Life as the Emasculating Bot-fly. 



I do not suppose that there is anything unusual in finding larvae living in human 

 flesh, but is not the traveling about unusual? 



We immediately wrote Dr. Kane, expressing incredulity regarding 

 the traveling of the grub from the elbow to the eye in the space of five 

 months, and urged strongly that she endeavor to secure the specimen. 

 She wrote to Dr. Freeman, who with great promptness forwarded the 

 specimen in alcohol with the following note: 



I am not only willing but anxious the grub be sent to Washington for determination. 



The evidence of both father and mother, after describing the "pollywog" appear- 

 ance ifl its track should be very strong evidence of its being migratory, but putting 

 their statements all aside, I have positive knowledge of its movements, having first 

 seen its track over the scapula, then up the neck to base of ear which was enormously 

 swollen, from there to the outer corner of eye, which was entirely closed, then to 

 middle of cheek where it was plainly felt, a,nd the opening made and expelled. There 

 is no chance for mistake in this case. 



We have carefully examined the specimen with the result that it 

 seems without doubt to be a species of Hypoderma and closely resem- 

 bles Brauer's figure of the early stage of E. diana, which infests deer in 

 Europe, as also the same stage of the common S. hovis. 



We have shown this larva at figure 48, a representing the entire 

 larva, b showing the head, and c the anal end of the body. We place 

 the matter on record for what it is worth. The extensive traveling re- 

 ported we might be inclined to doubt, were it not for the confirmatory 

 •evidence in the case of H. bovis, published in this issue by Dr. Cur- 

 tice. 



THE DOGWOOD SAW-FLY. 



Harpiphorus varianus Norton. 



In a recent number of the Garden and Forest October 30, 1889, Vol. 

 2, p. 520), Mr. J. G. Jack presents an interesting article, illustrated by 

 ■drawings by Mr. 0. E. Faxon, under the title "■ A Destructive Cornel 

 Saw-fly {Harpiphorus varianus Norton)," the larvae of which for two 

 or three years past have been quite destructive to the foliage of various 

 Dogwoods in the Arnold Arboretum. 



