572 PROCEEDINGS OF THE XATIONAL MUSEUM. vol. xxxvi. 



first axillary, second axillary, third axillary, and, fowth axillary.) 

 O sselets radicMux ClvAhv'iQY (1820). E pid ernes d''artindation (?) Au- 

 douiii (1824). Ejyauliers of elytrum, axiUaircs of wing, Straiis- 

 Diirckheim (1828). .la-es Kirby and Spence (1826). Tergalplatten 

 and analgelenkplattcn Y OSS (1005). Pezsi articola7^i 'Berlese (1900). 



Axillary cord {AxC) . — The thickened and nsually corrugated pos- 

 terior cord-like edge of the anal membrane of the wing normally 

 arising on each side from the posterior lateral angle of the notum 

 and thus serving as a mark of the posterior limits of the latter. Lig- 

 amentitm aim Lendenfeld (1881). Cord-like structure Comstock and 

 Kellogg (1002). Ligamento Berlese (1000). 



Axilla7y memh7'a?ie (^ixM). — The membrane of the wing base, 

 specially evident as the very delicate memlu-anous expansion at the 

 posterior basal angle of the Aving. The alula' are extreme enlarge- 

 ments of this part of the axillary membrane. 



Axillary srlentcs. — See Axillaries. 



Cercus {Or). — The cerci are the appendicular organs of the tenth 

 abdominal segment. Cercus Kirby and Spence (182G). 



Cervical sclerites {mi). — The sclerites of the microthorax situated 

 in the membrane of the neck. Pieces jugidaries Straus-Diirckheim 

 (1828). Prothoracic jmrajdcra Newport (1830). Cervical sclerites 

 Comstock and Kellogg (1002). Sclerites of microthorax Verhoeff 

 (1002). Vo)- plat fen of prothorax, B()rner (1003). Pezzi ingidari 

 Berlese (lOOG). 



Costa (C). — The first vein of the wing, usually forming its an- 

 terior margin. 



Coxa (Cx). — The basal segment of the leg. Clavicida (prothorax), 

 coxa (meso- and metathorax) Kirby and Spence (1820). TIanche 

 Straus-Diirckheim ( 1828 ) . Coxa genvina Walton . ( 1000) . 



Comal cavity {CxC). — The cavity on the outside of the body 

 formed by the projecting pleurites and sternum, sometimes inclosing 

 the coxa as in a socket. 



Coxed process {CxP). — See Pleurcd coxal process. 



Coxo-axiUary muscle. — The muscle extending from a large disk of 

 the wing base, usually attached to the second axillary, to the anterior 

 rim of the coxa. Muscle coxali-axillaire Chabrier (1820). 



Cuhitus (Cu). — The fifth principal vein of the wing. 



Dorsum. — The entire back of the insect or of any part or segment. 

 Dorsum Audouin (1824). Crampton (1000). Used in various ways 

 by other authors, sometimes to signify the entire upper surface, some- 

 times synonymous with notum or tergiim and even wnth scutum. 



Elytrum {El). — The anterior wing of Coleoptera and Euplexop- 

 tera. Elytrum Fabricius ( 1778) , Kirby and Spence ( 182G) . Elytron 

 common spelling. 



