DIPTERA. — G&STRID&. 575 
he had seen many specimens of the larva of Phora Sphingidis emerge 
from the body of a sphinx, and Mr. Carpenter found the larve of 
Phora atricapella (Curtis, B. /. p. 437.) hanging to the pup of Coc- 
cinella, which soon afterwards underwent their transformations. Ihave 
repeatedly observed, on disturbing the nest of the common brown gar- 
den ant, a very minute species of Phora hovering over and flying upon 
the ants. The larva of Phora Dauci (fig. 132. 12.) was, however, 
observed by Bouché in rotten radishes; it is cylindrical, somewhat 
narrowed in front, and the terminal segment has eight radiating 
pointed appendages, and also bears the two spiracles on its upper 
side. The perfect insect materially differs from the rest of the family 
in the neuration of the wings ( fig. 132. 13. Phora—? 14. its antenna). 
Amongst the exotic species of this family many exhibit remarkable 
variations of structure: of these, the more striking are the splendid 
Rutilia, from New Holland ; the Indian genus Celyphus, in which the 
scutellum is dilated into an immense semi-hemispherical mass, covering 
the body, as in the Scutellarze; the genus Diopsis has the sides of 
the head extended into a pair of long inarticulate horns, at the ex- 
tremity of which the eyes and antenne are placed ( fig. 132. 9. Diopsis 
Meigenii, 10. mouth of D. Sykesii). Wiedemann has described some 
allied and equally singular genera, chiefly from Brazil; and Diateina 
Holhymenidides Westw. (Microtoma Peleterii Lap.) has exceedingly 
long legs, and antenne considerably longer than the body, greatly 
resembling the Hemipterous genus Holhymenia. 
The family of the Bot flies, distrip©*, corresponding with the Lin- 
nean genus Cistrus (fig. 132. 16. Gasterophilus Equi), is distin- 

* Brisriocr. REFER. To THE Cistripa&. 
Linneus. Om Renarnas bromskulor ( Cistr. Tarandi), in Vetensk. Acad. Handl. 1739 ; 
and in Act. Soc. Upsal. 1741. 
Treiwald. Ytter ligare Ron, &c. Experiments on Céstr, Tarandi, in Vet. Acad. 
Handl. 1739. 
Arture. Obsery. sur Esp. de Ver nommé Macaque, in Mém. Acad. Sci. Paris, 
1753. 
Modeer. Styng-flieg slagtet (Monogr. Cistrus, 10 sp.), in Vetensk., Acad. Handl. 
1786. = 
Fischer, J. L. Obsery. d. Gistr. ovino atque bovino, 4 pl. 4to. Leipsic, 1787 ; 
and in Werner’s work on intestinal worms, Svo. Leipsic, 1788. 
Bracy Clark. Obsery. on the g. Gistrus, in Trans. Linn. Soe. vol. iii. 1797, — 
