550 CATALOGUE OF 



*** Prothorax non cristatus. 

 f Oculi elongati, vix prominuli. 

 f Femora postica longa. 

 Prosterni spina robusta, obliqua, saepissime arcuata et mesolboracem 



attingens. 

 -f- Protborax non tricarinatns. 



Genus 8. CYRTACANTHACRIS. 

 Acridium, Div. 1, Serv. Div. 2, A, Burm. 



This genus is distinguished by the curved and oblique prosternal 

 spine, which in the typical species extends to the fore border of the ineso- 

 sternura. It includes several groups. 



The long wings of the American species here described distinguish 

 them from C. Milberti, and their unspotted hind wings distinguish them 

 from C. cribrata. 



North America, 

 1. CYRTACANTHACRIS MILBERTT. 

 Acridium Milberti, Serv. Hist. Orth. 648. 

 North America. 



2. CYBTACANTHACRIS AMERICANA. 



Gryllus Americanus, Drury, Ins. i. 128, pi. 49, f. 2 Locusta Tartarica, 

 Westw. ed Drury, i. 121, pi. 49, f. 2 Acridium Americanum, Scudder, 

 Bost. Soc. Nat. Hist. 1862, 466. 



a, b. Georgia. Presented by E. Doubleday, Esq. 



West Indies. 

 3. CYRTACANTHACBIS INSCRIPTA. 



Foem. Fulva, sat gracilis ; vertex lineis duobus nigris gutlularibus^ 

 antice depressus hexagonalis ; antenna picece, basifulvce ; prothorax 

 vittis sex nigris abbreviatis aut inter r u pti s ; femora postica nigro 

 punctata et bistrigata ; ales anticce cinerece, vitta discoidali interrupta 

 quadriramosa gultisque subcoslalibus e venis nigris; alee posticce 

 patlide drier ece. 



Female. Tawny, rather slender. Head smooth, with two lines of 

 black dots converging from the hind border to the hexagonal depressed 

 compartment in front of the eyes; front almost perpendicular, with four 

 keels, of which the outer pair diverge towards the face, and the inner pair are 

 almost parallel. Eyes oblique, elongate-oval. Antennae piceous, slender, 

 filiform, tawny at the base. Prothorax minutely scabrous, with six black 

 stripes, the inner pair much interrupted, the two outer pair much abbre- 

 viated; dorsal ridge slight, most distinct towards the hind border ; four 

 transverse impressed lines, the front line interrupted in the middle ; the 

 breadth increasing from the hind line to the base of the fore wings ; sides 



