INSECTA. 
559 
face wax-yelloW ; eyes with green lustre. Pronotum and scutellura dirty- 
grey, and bearing some black bristles, like the forehead and hinder part of 
the body. Abdominal rings black, shining, with a very narrow yellow edge 
posteriorly. Ilalteres yellow ; legs black, with the tips of the femora yellow 5 
wings transparent, the 3rd, 4th, and 6 th longitudinal veins very fine and 
transparent. The larva lives on Orohanche. Appears in April. 
Agromym populi, Kaltenbach, Verhand. naturh. Ver. preuss. Rheinl. und 
Westph, 1864, p. 336. This species belongs to Meigen’s division C. c. Taf. 61. 
fig. 36. Individuals of the summer-generation are very similar to A.Jlava, but 
readily distinguished by the texture of the wings. Those coming forth in 
spring are grey or dark-grey ; head, antennse, halteres, and legs yellow. 
Hydromyzides. 
Discomyza mcttrva. Bergenstamm (Verb, zool.-bot. Ges. in Wien, Band xiv. 
pp. 713-716) describes the metamorphosis of this species, the larvje of which 
are found in considerable numbers together in putrid snails. The specimen 
of Helix pomatia examined by Bergenstamm contained about 6 O larvm ; when 
full-grown these attach themselves in rows, side by side, to the wall of the 
outer whorl of the snail-shell. 
New genera : — 
Hyyrophiln, laoy, Atti Ist.Ven. 3" ser. tomo ix. p.ll02. Allied to Bphydra ; 
.^ista tomentose ; first transverse vein near the middle of the wing, second 
near its inner margin. Sp. Bphydra fascipennis (Macq.). 
Falosoma, Lioy, 1. c. p.ll02. Allied to preceding; arista naked ; first trans- 
verse vein near the base of the wing. Sp. Bphydra aquila (Fall.), pictipennis 
(Meig.), &c. 
3Iyodris, Lioy, 1. c. p. 1103. Allied to preceding ; arista plumose ; marginal 
vein without a terminal appendage. Sp. Notiphila annrdata (Fall.). 
Bphydrosoma, Lioy, 1. c. p. 1103. Allied to preceding ; face with two small 
bristles; arista tomentose; marginal vein without appendage, first transverse 
vein near middle of wing, second near its inner margin. Sp. Bphydra rufpes 
(Meig). 
New species : — 
Bphydra stibopaca, Loew, Berl. ent. Zeitsch. 1864, p. 98, from Connecticut. 
Camia spinosa, Loew, 1. c. p. 99, from Massachusetts. 
Notiphila oHalidoides, Walker, Proc. Linn. Soc. vol. vii. p. 222, and N, uni- 
color ^ Walk, ibid., from Mysol. 
(EsTRIDyE. 
. Brauer (Verb, zool.-bot. Ges. in Wien, Band xiv. pp. 891-893) mentions the 
occurrence of ffistridnn larvre, probably belonging to tlie genus ddromyia^ 
upon a fieldmouse (Ilypudems arvalis). These parasites were discovered by 
Hering; and the larvae, with the tumours which they cause in the ingiinal 
region of the fieldmouse, are described and figured by Brauer, l.c. p. 892, taf. 21. 
Brauer also notices (/. c. p. 804), on Hering’s authority, the occurrence of 
larvae of Dermatobia on a puma (Felis co7Wolor). 
Ercolani describes the development of the larva of Gasterophilus equi ; 
Rendic. Accad. Sci. Bologna, 1864, pp. 20-26. 
