22 PROCEEDINGS ENTOMOLOGICAL SOCIETY 



quite generally followed by later Hymenopterists. The principal 

 departures from that system are in the introduction of the terms 

 brachius, anal, intercalaris, intercosta and prenervulus, as names 

 for veins and crossveins, changing the term transverse median 

 nervure to nervulus and the use of the prefix "inter" instead of 

 transverse for the cubital and radial crossveins. Cresson's 

 second discoidal cell is changed to first brachial cell and his first 

 apical cell to second brachial. 



The application in some cases of distinct names to the different 

 sections of longitudinal nervures (e.g., the first longitudinal vein 

 equals costa + stigma + metacarpus) may seem unwise at first 

 sight to morphologists and even to systematists but we believe 

 that for descriptive purposes it is desirable since it makes possible 

 more exactness in descriptions. The terms intercalarial cell, 

 prenervulus and interradius are new terms, all others having been 

 used before in wing nomenclature and with the same meaning 

 as used here except in the case of the brachius, and anal veins. 



Section I. Cells. 

 Costal cell. I in all figures. 



The area between costa (or in some cases intercalaris) and 

 subcosta, basad of stigma. In Chalastogastra often divided by 

 intercosta; in Clistogastra occasionally wanting. 



Synonyms: Costal cell Norton 1867, Shuckard, Cameron 1882, Marlatt 

 1894, Fernald 1906, Cockerell and Robbins 1910, Costal area Kirby. 

 Area costalis Dahlbom 1845. Cellule costale Lacordaire 1834, de Ro- 

 mand. Cellula costalis Dahlbom 1845, -Thomson. Costalzelle Schmie- 

 deknecht 1907, Kieffer 1912. Costalcelle Neilsen and Henriksen 1915. 

 Areola costalis Haliday. Cellule brachiale Lepeletier 1825, Andre 1879. 

 Premier cellule brachiale Lepeletier 1836. Areola brachialis Andre 

 1879. Areola subbrachialis Hartig. Areola submargin/alis Foerster 1877. 

 Cellula inter cubitalis Dahlbom. Intercostalfeld Konow 1901. Areola 

 mediastina -Nees. Schulterzelle- Mayr. C-\-Sci -- Fernald 1906. C- 

 Bradley 1908. ScM (= 1st costal), Sci (= 2nd costal) Comstock and 

 Needham 1898, MacGillivray 1906. Sc (first costal) Comstock and 

 Needham 1898. 



Intercalarial cell. Fig. 1, X. 



The area between intercalaris and costa. Present only in 

 Chalastogastra with generalized venation. 



Synonyms: C Comstock and Needham 1898. 



Radial cell or cells. II and supernumbers in all figures. 



The area bounded posteriorly by the radius and anteriorly by 

 stigma, metacarpus or the margin of wing or a combination of 



