OF WASHINGTON', VOLUME XVIII, 19Hi 25 



First brachial cell Norton 1867. Areola bnicliitilia 'interior Nees. 

 Deuxieme cellule brachiale -Lepeletier. Praebrachial areolet Marshall 1885. 

 Areola praebrachialis Haliday. Intermediate area Kjrby. First basal 

 cellMorley 1913. M Comstock and Ncedham 1898, Bradley 1908, Mac- 

 Gillivray 1906. Cell 1st IV Robertson 1904. 



Discoidal cells. -V and supernumbers in all figures where they occur. 



The area beyond basal and bounded anteriorly by the cubitus 

 and posteriorly by discoideus and subdiscoideus, often divided 

 by two cross-veins (recurrents) in which case the cells are num- 

 bered from the base of the wing towards the apex. 



This area has been treated a number of different ways which 

 has been the cause of some confusion. Many authors have in- 

 cluded the first brachial as a discoidal and have excluded the 

 third discoidal numbering the three cells either right or left from 

 the first. 



Certain authors have treated the discoidal cells as is proposed 

 in this paper. In the great majority of cases it is necessary, 

 however, to list the synonymical terms under each cell. 



Synonyms: Cellula discoidale Dahlbom 1845. Discoidal cells Norton 

 1867. Areola discoidalis Foerster 1877. Discoidalzellen Schmiedeknecht 

 1907. Discoidalcellar Nielsen and Henriksen 1915. 



Synonymy of the First discoidal cell: First discoidal cell Shuckard, 

 Cameron 1882, Ashmead 1900, Cresson 1887, Fernald 1906, Cockerell and 

 Robbins 1910. Discoidal cell Smith. Erste discoidalzelle Ratzeburg 

 1848, Zaddach, Kohl 1896, Friese 1911. Cellule discoidale Andre 1879. 

 Areola discoidalis prima Foerster 1877, Andre 1879. Cellula discoidalis 

 prima Costa. Discoidalzelle Mayr, Konow 1901, Enslin 1912, Kieffer 

 1912. Premiere cellule discoidale Lepeletier 1825. Deuxieme cellule 

 discoidale de Romand. Cellula discoidalis interior Gravcnhorst. Cell- 

 ule discoidale superieure externa Wesmael. First discal cell Marlatt 

 1894. Areola exterior Haliday. Areola praediscoidalis Haliday. Prae- 

 discoidal areolet Marshall 1885. Areola costalis Fallen. Cellula furcata 

 Thomson. M 4 Comstock and Needham 1898, MacCillivray 1906, Fer- 

 nald 1906, Bradley 1908. Cell 2nd IV Robertson 1904. 



Synonymy of the Second discoidal cell: Second discoidal cell Cameron 

 1882, Banks 1912. Cellule discoidale 2 Andre 1879. Zweite Discoidalzelle 

 Zaddach, Kohl 1896, Friese 1911. Areola discoidalis secunda Foerster 

 1877, Andre 1879. Cellula discoidalis secunda Costa. Cellule discoidale 

 Berthoumieu 1904. Cellula discoidalis Thomson. Second discal cell 

 Marlatt 1894. First discoidal cellMorley 1903. Third discoidal cell 

 Shuckard, Cresson 1887, Fernald 1906, Cockerell and Robbins 1910. Troi- 

 sieme cellule discoidale Lepeletier 1836, de Romand. Cellule discoidale 

 inferiewe Lepeletier 1825, Wesmael. Cellula discoidalis intermedia 

 Gravenhorst. Areola exterior Haliday. Areola intermedia Graven- 



