ACRIDlDiE. 



027 



Fore wiugs as long as tlie body, 

 of the fore Willi's 16 lines. 



Length of the body 7^ lines ; expansion 



It is the most diminutive of all the typical species of Acridium. 

 a. Madagascar. Presented by J. Caldwell, Esq. 



Asia. 



A. Hind wings rosy at the base. 



a. Keel of the prothorax well defined. - - vinosum. 



b. Keel of the prothorax very slight. - - succinctuni. 



B. Hind wings purple at the base. - - - violasceus. 



c. Hind wings not rosy nor purple at ihe base. 

 * Hind wings spotted. 



t Hind wings yellow at the base. . . - flavescens, 



W Hind wings not yellow at the base. - - fumosum. 



** Hind wings not spotted, 

 t Prolhorax spotted. - ' - - - pardalinum. 



ft Prothorax not spotted. 

 X Prothorax much widened hindvvard. - - rubesceus. 



XX Prothorax not much widened hindvvard. 

 § Prosternal spine acute. 

 X Keel of the prothorax well defined. 



o. Tip of the vertex hexagonal, - - - albidiferum. 



00. Tip of the vertex subhexagonal. - - - punctarium. 



000. Tip of the vertex nearly triangular. . - - dorsale. 



0000. Tip of the vertex conical, not transverse. - deponens. 



00000. Tip of the vertex transverse. - - - - Sinense. 



X X Keel of the prothorax very slight. 



o. Tip of the vertex transverse. ... uitidulum. 



00. Tip of the vertex nearly round. - - saluralum. 



§§ Prosternal spine very obtuse. 



X Prosternal spine compressed. - - - Coreanura. 



X X Prosternal spine not compressed. 



o. Tip of the vertex hexagonal. - - innotabile. 



00. Tip of the vertex nearly round. - - - delineolatum. 



A. vinosum, fumosum, flavescens, pardalinum, rubesceus and 

 violascens are comparatively typical species of the genus. A. succinctuni 

 has a slight tendency to the Heteracris form ; this form appears more in 

 A. deponens, Sinense and Coreauum. The hind femora of A. dorsale are 

 very thick and in that character it resembles the Caloptenus type. 



Acridium albidiferum. 



Masetfoem. Fulvum,robustum ; caput poslica albidum,fastigio hexagonali ; 

 antenna nigrm ; prolhorax scaber, cariuatus, nonnunquam ftrrugineo 

 vittalus, postice latescens el leslaceo poslulatus, margine postico pro- 

 dticlo; proslerni spina lunga, compressa, acula, nonnunquam alba; 

 femora poslica nonnunquam a.lbida, exlus nigra bilineala, inlus ritfo 

 villata ; libice posticce carulece aul purpurascenles, siiblus albcc, spinis 

 albis apice nigris ; alec unliccc pallide cinerece, 7ionnunqiiam slrigulis 

 plurimis 7iigris, plaga basali e venis nigricantibus. 



