DELPHACIN^. 465 



Subfamily XII. DELPHACIN.E. 



Delpliacida, Sthl, Hem. Afr. iv, pp. 131 & 175 (1866). 



Delphacina, Sfal, Ofv. Vet.-Ak. Fork. 1870, p. 747 ; Atkins. 



J. A. S. Beng. Iv, p. 35 (1886). 

 Delphacidaj, Mdich. Horn. Faun. Ceylon, p. 11 (1903). 

 Asiracinas, Kirk. J. Bomb. Nat. Hist. Sac. xiv, p. 52 (1902). 



The Dephacinai is the most easily recognized subfamily of the 

 Fulgoridae by a single characteristic alone, which consists of a 

 long robust mobile spur attached to the apices of the posterior 

 tibiae. We probably know less of these insects than of any other 

 group of the EulgoridsB ; they are small and generally minute 

 species, easily overlooked and seldom collected, and although the 

 present contribution is a considerable advance in number of 

 genera and species to any previously given as found in British 

 India, it is absolutely certain that it only refers to a fraction of 

 the Delphaciiun really found in this region. The number of species 

 from Ceylon collected by Mr. E. E. Green conclusively proves 

 what can be done by other workers in our Indian Empire. 



8>jnopsis of Genera. 



A. Head not promiuently produced in front of 

 eyes. 



a. Head semicircular, vertex and face roundly 



continuous Paranda, p. 406. 



b. Head not semicircular, vertex and face 



more or less discontinuous. 

 (t. Vertex of head broader than long. 

 a' . Tegmina with oblique veins on apical 



costal area Pundaluoya, p. 467. 



h' . Tegmina without oblique veins on 



apical costal area Upachaka, p. 469. 



h. Vertex of head longer than broad. 



a' . Antennae very long and broad .... Purohita, p. 470. 

 b' . AntennjB of moderate length. 



a~. Face more than twice as long as 

 greatest breadth. 

 a^. Vertex without a median trans- 

 verse ridge and nou-foveate . . Sogata, p. 471. 

 b^. Vertex with a median trans- 

 verse ridge, behind which the 



disk is foveate Toya, p. 472. 



b'. Face not more than twice as long 

 as greatest breadth. 

 a^. Face with the cariuations very 

 broad and pi'ominent, the cen- 

 tral one furcate at base Nilapabvata, p. 473 



b'^ Face with the carinations only 

 moderately pronounced, the 

 central one not furcate at base. Kalpa, p. 474. 

 TOL. III. ■ 2 H 



