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Show 304 INSECTA. deposits its eggs in vessels containing vinous liquors, belongs to this subgenus. We formerly referred it to Mosillus(l). The Muscides of th~ three following divisions have an oblong body; the wings are incumbent and nonvibratile; the head, either rounded or almost spherical, or nearly pyramidal, or bordering on an oval, is plane above, prolonged and narrowed into a point, usually truncated or obtuse at its anterior snperiot· extremity; and the face is covered with a white membrane, furrowed longitudinally on each side. The head is frequently compressed below the antennre, and its inferior or oral extremity projects in the manner of a truncated snout; in others, the face forms a strongly inclined plane, which is not (or almost not) turned up inferiorly. The antennre are inserted on the top of the front and sometimes even received in fossulre, but they most commonly project, are straight and distant, and in several as long as the head, or longer. In all the other Muscides, they are always shorter than the head. The Muscides of the fourth division, that of the SoATOMYZIDEs, as well as those of the fifth, are distinguished from the species of the sixth, by the following characters: the head, viewed from above, is never longer than it is broad, its form being nearly spherical or triangular; the posterior legs are never much longer than the body nor very slender, and the body, though sometimes narrow: and elon-gated, is not filiform. Here, the Scatomyzides are distinguished from the Muscides of the following division, or the Dolichoce1·a, by their antennre, of which the third joint is evidently longer than the preceding one; with the exception of a single genus, Loxocera, they are always shorter than the head. The anterior and superior extremity of this latter part of the body rarely projects beyond the eyes, and when viewed from beneath usually appears almost hemispherical, and rather wider than it is long. Sometimes the posterior legs are large and distant, their thighs are thick or compressed, and the joints of their tarsi dilated or widened. The antennre are always very short, with the last joint lenticular or nearly globular, and furnished with a simple seta. The sides of the face are pilose and silky. (1) It may perhaps be a Piopl~yla, Fall., a genus in which is placed the M. casei, .L., whose body is very black and glossy; epistoma, front and legs, fulvous; anter1or legs and posterior thighs with a. black ring. DIPTERA. 305 THYREOPHORA '• Lat• M et·g .-..t.ru.z uaca, Panz. ~here the antennre are received into lenticular, but not transv a sub-frontal cavity with a from its summit to the m:::~'. pt~~ette; the. head gradually inclines the second and following . . ' f' e posterior thighs are thick ancl All JOmts o the tar · ' the terminal cells of th . SI are almost similar. edge. The pal pi are much ~ dwmgs are closed by their posterior spatula. WI ened at the end in the manner of a bl T. cynopltila, Panz. ' Faun · I nsect. G erm XXXIV ue; head reddish-yellow· two bl k '. , 32. Deep scutellum terminated by t , . ac pomts on each wing· . wo spmes. Fou d d ' always m autumn· Ace Ol· dm' g to an obr n ·o n ead dogs, and to me by one of our most I d o:~ervatwn communicated M earne and zeal · Percheron Jun th' I . ous entomologists ' · IS nsect 1s som t' ' peculiarity that struck on f h' f . e Imes phosphorescent, a h . e o IS nends 1 · Is chamber at night a 1 • d . w 1 0 Witnessed it in ' nc m uced hun to capture it(I). SPH.lEROOERA, Lat• - Bor bo rua, Mei. g.-Oop1·omyza, Fall. . Where the antenn::e are salient, with the rical and transversal· th h d . palette almost hemisphe- ' e ea 1s abruptly and turned up near the or"l . f . concave below the front is bordered; the posterior"' t:.avhity, o whtch the superior extremity .. t f lg s are compressed d h JOlll s o their tarsi are eviden tl . d ' an t e two first The second cell of the poste ~ WI er tha~ the following ones. of those which occupy the 'drdilor efxtre~mty of the wing-the last h mi e o the1r length · 1 t e posterior edge. The robos . . . -Is c osed before depressed. p CIS lS very thick, and the body is These Diptera are almost alwa f, • hills, which is most probably th y~ dound m .the vicinity of dung- Sometimes the posterior le e a o e of th~tr larvre(2). The antennre of several are 1 gs scarcely differ ft·om the others. and their seta is frequently ~~:ost ~Ion~ as the face of the head, sionalJy glabrous. p e. he stdes of the face are occa- In some, the antennre are almost as long as the face, inclined, (l) Lat., Gener. Crust et 1 (2) Lat., Ibid., IV, 35;. Wi:~ec~, IV, ?58; and Meigen. VOL. IV.-~ 0 ., nal. Entom., under the name of Copro7nyza. |
