566 rROCEEDiyaf^ of the XATTOyAL MUSSEUM. vol.xxxvi. 



4. Protlioracic coxa not articulated to true coxal process, but to a 

 suiall detaclred plate in Phassus (152 p) which in Protoparce and 

 Citheronla is fused with lower end of episternuni. 



5. Meso- and metathoracic coxse (149, 153) double in adults as in 

 Neurojitera and Trichoptera, consisting of an anterior true coxa 

 {Cse) and of a i^osterior j^late (epm), undoubtedly derived from the 

 epimerum (Epm) as in CorydaUs and Nciironia. The coxae have 

 but little motion upon the pleurum and the principal movement of the 

 base of the leg is in the articulation between the coxa and the tro- 

 chanter. 



G, Trochantin present in both meso- and metathorax (149, 153, 154, 

 158, 159, Tn), but more or less completely fused with episternum 

 (Ej^s) above, and always closely attached to a wing of sternum {S) 

 in front. This is exactly the sauie as in CorydaUs (147) and Neuronia 

 (148). Lower end sometimes projecting as a free point articulating 

 with ventral rim of coxa and sometimes obsolete. 



7. Only one preparapteruui present (149, 153, 7^), and it is fused 

 with epistei-num. Pronator disc (154, PD) carried by upper edge 

 of epistei'num. 



8. The pleural Aving process of mesopleurum (153, 154, 159, WP) 

 bears a large anterior arm {tg A) serving as a prop for the tegular 

 plate of the notum (150, 150, tg). 



9. Mesothoracic notum (150, 15()) disliuctly subdivided into a 

 prescutum {psc) carrying the prephragma (155, Apli), a scutum 

 divided into two lateral lobes {set., set) carrying the anterior notal 

 wing processes {ANP) and, in Phassus, the posterior processes also 

 (150, PNP), and into a scutelhnn (sy-/) foruiiug a posterior triaugle 

 (srJ) whose lateral angles terminate in the axillary cords (AxC). 

 Probably in most fauiilies the posterior notal wing processes (P.YP) 

 would appear to belong to the scutellum (scI) as in Protoparcc (15G). 



10. Tegul.T greatly developed in mesothorax (149, 150, 202, Tg) 

 and attached to a special tegular plate of the notum (149, 150, 15G, 

 tg) supported by the tegular arm (153, 154, 159, tg A) of the wing 

 process {AYP). 



11. Metanotum in lower forms like Cossida) (151) similar to, though 

 smaller than, the mesonotum (150). In liigher families it becomes 

 very much shortened antero-posteriorlv, as shown by Protoparce 

 (157), and greatly reduced in proportion to the mesonotum (15G). 



12. A pseudonotum {PN) present in both meso- and metathorax, 

 though depressed aud mostly liidden (149). In mesothorax (150, 

 15G, PN) it carries a large i)ostphragma {PpJi). In metathorax 

 (151, 157) postphragma (Pph) is smaller and fuses with first ab- 

 dominal tergum (149, 151, IT). 



