180 PROCEEDINGS OF SOCIETIES. 



sion to use abbreviated, as this may tend to the convenience of the 

 reader, without adding much to the bulk of the list : — 



LIST OF THE GENERA AND SPECIES OF BRITISH DIPTERA, THE EARLIER STAGES 

 OF WHICH ARE MORE OR LESS PERFECTLY KNOWN, WITH REFERENCES TO 

 THE PRINCIPAL AUTHORITIES. 



N. B. — The genera and species known as British are in capitals; the 

 other European species introduced into this list, for illustration, in de- 

 fault of indigenous examples, are in Italics ; as are also the Synonyms 

 and Subgenera. 



Earn, i. Pitlicid.e. Larva of thirteen segments, peripneustic, euce- 

 phalous, sanguisugous. Pupa extricated, commonly folliculate. 



Pulex, (B. D. rv 1.) Cestoni, Philosophical Transactions, 1699. 

 Esl., Ins. B. ii. Dg., M. vii. Wwd., G. Chr. 1848. Hal., N. H. It. 

 1855. 



Earn, ii. MYCETOPHILIDiE. Larva peripneustic,* eucephalous, 

 vermiform ; fungivorous or saprophagous. Pupa extricated, often folli- 

 culate. 



Bolitophila fusca, (B. D. iv. 71.) Grn., A. S. IS", x. 1827. Df., 

 (if. hylrida) A. S. X. xii. 1839. 



Mtcetobia pallipes, (B. D. iv. 50.) Lyonnet, 0. P. PI. xvii. f. 20, 

 etc. Df., A. S. E. E. vii. 1849. 



Ditomyia fasciata, (B. D. iv. 63.) Mg., Zw. i. "Wz. (trifasciata,) 

 E. Z. 1846. Plesiastina holeti, Kit, A. N. H. ii. 1848. 



Ceroplatus tipuloides, Df., A. S. K". xi. 1839. C. sesioides, Wlbg., 

 A. Holm. 1848. See Em., M. v. 



Platyttra margin ata, (B. D. iv. 64.) Mg., Zw. i. P. laticornis, (B. 

 D. iv. 65.) Schil., V. Schl. G. 1837. 



Asindulum flavtjm, (B. D. iv. 47.) Wz., (Macrorrhyncha id.) E. Z. 

 vii. 1846. 



Cordyla (B. D. iv. 24.) crassicornis, Df., A. S. JS". xii. 1839. C. 

 fusca, Br., Isis 1846. 



Sciophlla margin ata, (B. D. iv. 36.) Roser, W. Zw. S. mehnoeephala, 

 Df., A. S. 1ST. xii. 1839. S. unimaculata, striata, Per., A. S. E. E. vii. 

 1849. 



Tetragoneura hirta, (B. D. iv. 44.) Wz., E. Z. 1846. 



Leja (B. D. iv. 26) fasciata, Roser, W. Zw. 



Mycetophila ltjnata, (B. D. iv. 13.) Hg., Sb. W. A. vii. 1851. M. 

 arcuata, etc. Df., A. S. Is, xii. 1839. M. scatophora, lycogalce, Per., 

 A. S. E. E. viii. 1839, vii. 1849. See also, Em., M. iv. Dg., M. vi. 

 Mg., Zw. i. Bou., Ng. Stn., Isis 1830. Br., Isis 1846. Eoser, "W. 

 Zw. Scholz, S. E. Z. 1849. 



* According to Dufour, the larva of My cetobia pallipes is amphipneustic. Although 

 the larva has been noticed by other observers also, we have no means of either con- 

 firming or refuting this statement. 



