1893.] | Entomology. ` 63 
diameter of this false tubercle is as great as the posterior width of the — 
sixth abdominal segment. The fluid which distended it is perhaps 
homologous with the meconium of butterflies. 
The description of the manner in which the pupal skin splits to 
allow the escape of the fly was omitted in the description of the pupa 
of Tdxophora virgata in the article above referred to. It is accom- 
plished in the same way as just described for the present species, except 
that the dorsal median split does not reach posterior margin of thorax, 
and the dorsal pieces of head are notso much detached from their lat- 
eral thoracic fastenings, and are left more quadrangular in shape by 
the oblique lateral breaks of head. It may also be mentioned that a 
section of the trachez is left attached to inside of prothoracic spira- 
cles. 
. My reasons for calling the first abdominal segment of other authors 
the scutellar segment, are stated in the article on Toxophora. 
C. H. TYLER TOWNSEND. 
The Horn-Flyin Canada and Texas.—Mr. James Fletcher, 
Entomologist to the Canadian Department of Agriculture, announces? 
that the Horn-fiy (Hæmatobia serrata) has appeared in enormous 
numbers in the Provinces of Ontario and Quebec, causing considerable 
anxiety to stock-owners. It was first definitely heard from at Oshawa, 
Ont., July 30, 1892. An excellent résumé of the life-history of the 
pest and of the means of' preventing its injuries is given. 
That this insect is also spreading rapidly in the southwest is shown 
by the following note from Dr. Mark Francis, of the Texas Agricul- 
tural College, who wrote me under date of Oct. 18, 1892, from College 
Station: “The horn-fly seems to be spreading westward. I saw it at 
Stillwater, Oklahoma, two weeks ago. It has not reached here yet, 
but I saw great numbers of them at Hempstead, Texas (forty miles , 
southeast of here) last Friday. I think there can be no doubt as to 
its identity, as I have compared them with type specimens from Prof. 
H. Garman, of Kentucky.” 
Two days later Dr. Francis again wrote that the horn-fly was 
observed at College Station, Oct. 19, for the first time. 
In Southern New Hampshire this insect has been very numerous 
the past season, and it has been gradually spreading northward through 
New England. Buta hopeful report comes from New Jersey, where 
the insect was first observed. Prof. J. B. Smith states that it now 
causes little trouble there, and is seldom noticed as specially abundant. 
2Central Exper. Farm, Ottawa, Bull. No. 14. 
