BY F. VV. CODING. 25 



ulnar veins behind the third and fourth apical cells; furnished 

 with a transverse venule between the two ulnar veins, near base. 



Wings with four apical cells. 



Tibiae flattened and lightly dilated. 



Type, Centrotus falcatus, Walk. 



This genus differs from the last section of Sertorius in having 

 three discoidal cells. 



Dedicated to Mr. Charles French, Government Entomologist 

 of Victoria, for his uniform kindness and courtesy. 



Synopsis of Species. 



1 (2). Falciform portion of lateral horns brief, base of posterior 



process broad Leca. 



2 (1). Falciform portion of lateral horns very long, base of pos- 



terior process proportionately slender , falcata. 



*E. FALCATA, Walk. 



1851, Centrotus falcatus, List Hom. Brit. Mus. p. 62. 

 1869, S. curvicornis, Stal, Of v. K. Yet. Ak. Forh. p. 287. 



Head piceous, punctulate; ocelli above a line passing through 

 centre of eyes, a little nearer to the eye than to each other. 



Prothorax fusco-ferruginous, densely and strongly punctured, 

 almost reticulate with a median longitudinal carina which is 

 interrupted between lateral horns, seen from front, narrowed 

 upward, lateral horns contiguous at base, erect to middle, then 

 strongly curved outward and downward, broad, long, sides 

 parallel, apices truncated, anterior apical angle rounded, posterior 

 angle in a prominent tooth; posterior process convex, rather 

 slender, curved downward from middle, apex black, reaching tips 

 of tegmina. 



Tegmina pale subfuscous hyaline, veins fuscous, punctured on 

 each side, the basal and costal cell subferruginous, punctured 

 beyond middle. Chest black, a spot on chest and scutellum 

 yellowish-gray pubescent. 



Long. (J 5, 96; lat. (J 2, 9 2|; exp. corn. (J 6, 9 7 mm. 



Female differs little from male. 



