388 REPORT ON ZOOLOGY, MDCCCXLIY. 



The second section contains 10. 0. gracilis, new species, from the neigh- 

 bourhood of Posen; 11. 0. costalis, new species, from the south coast of 

 Asia Minor. 



In like manner he has illustrated the genus Idia, and shows that the 

 genus Rhynchomyia, Macq. (Tachina columbine/, Mg.), should be reduced to 

 it, the difference in the pubescence of the feeler-awn not being strong 

 enough to separate them. The author has seen the Mowing four species 

 alive* 1. /. lunata, Wied. (Musca id., P., Idia fasciata, Mg.), diffused over 

 all the South of Europe, extending to Asia Minor and Madeira ; 2. /. con- 

 cinna (Musca id., Germ. Pna., Tachina columbine, Mg.), Asia Minor, Greece, 

 Dalmatia, South of Prance ; 3. /. speciosa, new species, Asia Minor, Greece, 

 and Hungary ; 4. I. ci/ancesens, new species, from Asia Minor. They were 

 all found on flowers, feeding on the pollen. 



Wahlberg (6'fvers. K. V. Akad. Porh. 1844, p. 60) has added to 

 Mesembrina, a new species from Lapland, M. resplendent, resembling M. 

 mystacea in form, and M. meridiana in colour and pubescence, but smaller 

 than either of these. 



[Curtis (Gardener's Chron. 275), from the communication of Mr. Bolt, 

 has noticed an instance of an Earthworm (Lumbricus terrestris) being 

 infested and devoured by the parasitic larvae of Sarcoplwga carnaria. The 

 maggots were found upon the body of the worm, but they soon penetrated 

 into it, only the tail-end continuing exposed through a hole in the skin. 

 The larva of this fly seems to be a pretty indiscriminate feeder, although no 

 recent observations corroborate the account of Degeer, on which the trivial 

 name is founded, and in which this species appears to have been confounded 

 with some other flies. (Calliphora, TacAitiasee Report 1838, p. 374.) 

 Bouche (Naturg. Ins. 60) has found the larvse only in dung-heaps and rotten 

 vegetables. It is known to Lepidopterists also, like other species of the 

 genus, to be parasitic in caterpillars (e. g. of Vanessa io and Saturuia carpini) .] 

 Stenhammar has laid before the Stockholm Academy an essay on the 

 Swedish species of the Ejihydrini, which has been inserted in their Transac- 

 tions of 1843. (Ofvers. K. Vet. Akad. Porh. 1844, p. 35.) Beyond the 

 short notice here given I know this essay only from a fuller extract given 

 by Bohemann in his Annual Report on the progress of Zoology, for 1843 

 and 1844, p. 192. The author calls attention particularly to a part belonging 

 to the mouth, found in all Diptera, though generally rather imperfect, but 

 in the Ephydrini extraordinarily developed, surrounding the orifice of the 

 mouth as a horny ring. He calls it the prselabruni. Notice is taken also of 

 the unequal degrees of development of the lobe of the wing (the more or 

 less enlarged continuation of the hinder edge of the wing towards its inser- 

 tion), and the supposition put that the development of this part is connected 

 with the power of flight, which appears to be imperfect in all cases where 

 the wing-lobe is dwarfed. The abdomen is invariably composed of six seg- 



