ACR1DID.E. 609 



Genus MONACHIDIUM, C. D. S. 546. 



MONACHIDIUM LUNUS, C. D. S. 540. 

 a. Brazil. 



Genus CYRTACANTHACRTS, C. D. S. 550. 



The few following species of this genus and of Acridium were omitted 

 in the preceding pan of this Catalogue. 



America. 



A. Wings longer than the abdomen. 



a. Tip of the vertex hexagonal. 

 * Fore winas with markings. 



f Spine* of the hind tibiae white. 



J Prothorax with two concise stripes. 



Head short. - Americana. 



Ht-ad slightly elongated. 



X Pectus piceous. - - pectoralis. 



X X Pectus pale. - - viridescens. 



II Prothorax without two concise stripes. 



Hind wings not yellowish. 



X Hind femora streaked on the inner side. - - inscripta. 



X X Hind femora not streaked on the inner side. - subspurcata. 



Hind wings yellowish. - impleta. 



f-f Spines of hind tibia yellowish. 



| Keel of the prothorax distinct. - subvittata. 



|| Keel of the pi othorax indistinct. - - simulatrix. 



** Fore winys without markings. 



f Spines of hind tibiae pale. 



| Prothorax concisely striped. 



Stripe of the prothorax rather broad. - parvula. 



Stripe of the prothorax narrow. - alutacea. 



Stripe of the prothorax very narrow. - unilineata. 



|| Prothorax not concisely striped. ... septentrioualis. 

 |[;| Prothorax not striped. - - concolor. 



ff Spines of the hind tibiaB black. - - diversifera. 



b. Tip of the vertex elongate-subquadrate. - munda. 



c. Tip of the vertex conical. - differentialis. 



B. Wings not longer than the abdomen. 



a. Fore wings with black spots. - - cribrata. 



b. Fore wings not spotted with black. - Milberti. 



CYRTACANTHACRIS ALUTACEA. 

 Acridium alutaceum, page 577. 



a, 6. St. John's Bluff, E. Florida. Presented by E. Doubleday, Esq. 

 c. United States. Presented by F. Walker, Esq. 



