ACRIDID/E. 613 



§ Prothorax slightly widened hindward. 



X Fore keel of the prothorax low. - - . internexa. 



X X Fore keel of the prothorax high. - - - citrina. 



§§ Prothorax much widened hindward. - - compta. 



II Veins of hind wings not yellow towards the base. - subsellata. 



ff Spines of hind tibiae not while. 

 I Fore wings with markings. 

 § Prothorax with a concise pale dorsal stripe. 

 X Fore wings dark, with pale markings. - - . inclyla. 



X X Fore wings pale, with dark markings. 



o. Markings of the fore wings comparatively few and regular. 



-^ Dorsal stripe rather broad. - . - . concisa. 



-i — h Dorsal Stripe of the prothorax narrow. - - turbida. 



no. Markings of the fore wings comparatively many and irregular. 



-I- Hind wings without a yellowish tinge. - - variegata. 



-t—i- Hind wings with a yellowish tinge. - - decisa. 



§§ Prothorax with no pale concise dorsal stripe. - - fascifera. 



+ Fore wings without markings. - - - flavesceus. 



b. Hind wings red on nearly half the surface. 



* Fore wings with regular bands. . _ _ rubella. 



** Fore wings with patches. _ . . pictnia. 



c. Hind wings rosy at the base. - - . purpiirifera. 

 B. Head elongate. Hind legs very long and stout. Wings 



hardly long. - _ . - - prasina. 



C. prasina and C. auricornis are probably one species, which may be 

 considered as the type of a new genus. It has a transition character; in 

 the elongation of the head, the hind legs and the shorter wings it resembles 

 Heteracris, but it has the hexagonal tip of the vertex and the prothorax of 

 Cyrlacanlhacris and of Acridium. According to Brisout de Barneville's 

 arrangement in parallel series it is the form in the Aciidium group that 

 represents Heteracris in the Caloptenus group. 



Cyrtacanthacris internexa. 



C. ranacea, p. 556. C. ruficornis, Serville. 



The colour of the hind tibiae and of their spines aud the markings of 

 the fore wings distinguish this species fro..; C. ranacea, which inhabits 

 Hindostan. 



Cyetacanthacbis rubella, page 556. 



Gryllus (Locusta) cyaneus? Sioll, Sant. et Grill, pi. 15 b., f. 56 — Acridium 

 cyaueum ? Haan, Verz. Nat. Gesch. Ned. Ind. Bez. Ins. 153. 



Stoll states that the species described by him is from Surinam. 



CyUTACANTHACItlS COMPTA. 



Ftum. Fulva ; caput et prothorax nigricanle late hiviltuta ; caput nigri- 

 cante sexstrigatum, frontis carinis nigricante marginatis ; palpi 

 pallide (estacei ; antennce luttce ; prothorax postice scaber, vittis 

 quatuor nigricantibus testaceo pustulatis ; prosterni spina pallide 

 lestacea, crassa, obliqna, urciiata, acuta, virsosternum attingens ; 



