ENTOMOLOGY DIPTERA. 391 



cies [is S. minor, Hal., ibid.], abundant iii marshes iii August. B. Palps 

 abortive ; fore legs in the without teeth or spiues. 12. S. cylindrica, 

 Mg., nitidula, Fall. 13. S. varipes, Mg., coxarum, Zett. (?) Nemopoda 

 nigrilatera, Macq. B. Middle feet of the < dilated, fore thighs with the 

 lower edge dilated aud spinous, fore shanks nicked ; the last segment of the 

 abdomen with a pencil of hairs, often scarcely discernible, at each side. 

 14. S. annulqjes, Mg., Nemop. id., Macq. Enicopits id., Walk. Macq. 



Leon Dufour (Ann. Sc. Nat. i, 365) has given the history of Piophila 

 petasionis. The larva lives in the fat of cured hams, as that of P. casei in 

 cheese, and is equally a hopper. It differs from the cheese-hopper in having 

 a pair of hooks at the end of the abdomen. There is nothing particular to 

 be noticed in its internal anatomy. In the perfect insect <$ 9 there are a 

 pair of globular fleshy knots on the rectum. 



Loew (Germ. Zeitschr. V, 313, pi. 1, 2) has published a critical exami- 

 nation of the European species of Trypeta, Mg., an ample and admirable 

 essay, which at once gives the synonyms a thorough scrutiny, and adds 

 materially to the number of described species. It is made still more useful 

 by the markings of the wings in almost every species being very clearly 

 figured. The author has not admitted the genera proposed by later writers, 

 considering them as grounded on immaterial characters, and adheres accord- 

 ingly to the divisions employed by Meigen, which are at all events conve- 

 nient for determining the species. As the work is indispensable to every 

 one who desires to study the genus, it is unnecessary to go more into detail 

 as to the contents, and I will only add a few observations. 



[However, as Loew's essay may not be accessible to all the English 

 readers of this Report, the list of species is subjoined in the translation, 

 with the most important of the synonyms not given in Meigen's work. I. 

 With banded wings, a. The body yellow or greenish : 1. alternata, Fall., 

 continua, Mg. 2. meigenii, Lw., alternata, Mg. 3. zoe, Mg., intermissa, Mg., 

 ttrtcmisice, Walk., apiculis, Zett. 4. abrotani, Mg. 5. artemisiee, E. 6. coy- 

 nata, Wied., lucida, Eall. 7. speciosa, Lw., cognata, Macq. id. ?, Mg. 8. 

 flavcscens, E. 9. heraclei, L., onopordinis ct centaurece, E.] =Tej>/ir. va- 

 ripennis, Macq. Dipt. exot. [10. aiitlca, Wicd., gcedii, Mg., zetterstedtii, 

 Zett. \\.punctata, Schra., arctii, Macq. 12. arctii, Deg. Mg., dorsal is, 

 Macq. 13. tussilaginis, F., vicina, Macq. 14-. lappce, Cederh., tussila- 

 rjinis, Walk. 15. 8-punctata, Macq., lappte, Mg. 16. cornuta, E. 17. 

 Jiorescentia, L. 18. winthemi, Mg. 19. wiedemannii, Mg. b. Abdomen 

 gray : 20. marginata, Eall. c. Abdomen banded black and gray : 21. fas- 

 c!<ita, F. d. Abdomen glossy black : 22. centaurete, E., the same as No. 9. 

 23. lyclinidis, E. centa-urea, Eall. discoidea, Mg. 24. discoidea, E., lych- 

 -//V//.v, Eall., Mg. 25. femoralis, Desv. 26. rotundiventris, Fall. 27. 

 cardwi, L. 28. stylala, F. 29. solstilialis, L., cuspidata, Mg., p-ugiuualit, 



