JAMES A. G. REHN 251 



rami, while another specimen has two of the three rami bifurcate. 

 Again the uhiar vein is fused "with the median, in which case the 

 latter is quinque-ramose; while the most striki<ig variation in 

 the median vein is found in one specimen, which has it short, 

 diverging from the discoidal vein mesad and then biramose. 

 This latter condition is pronounced in but one tegmen, the other 

 one having the structure more nearly approaching the normal, 

 while the ulnar vein of the remarkable tegmen is triramose. 

 The color variation consists of a deepening of the general color, 

 rarely accompanied by an indefinite mottled pronotal pattern 

 of browaiish. The tegminal infumation is more brownish and 

 less greenish-brown in these specimens. 



Chorisoneura inquinata Saiissure? 



1869 . Chorisoneura inquinata Saussure, Revue et Magasin de Zoologie, 2e ser., 

 xxi, p. 112. [Brazil.] 



Ceara Mirim, Rio Grande do Norte. (W. M. Mann.) One 



male. 

 Independencia, Parahyba. (Mann and Heath.) Four 

 males. 



These specimens are appreciably smaller than the measure- 

 ments of the species given by Saussure and also differ in a few 

 apparently minor features of the coloration, but in the majority 

 of the characters they agree with inquinata, which was based on 

 the opposite sex from the material examined by us. It is prob- 

 able that the differences seen by us can be accounted for by 

 sexual diversity and so we prefer to consider them for the present. 



These are the onh' exact localities from which the species has 

 been recorded. 

 Chorisoneura tessellata new species (Plate XV, figs. 2G and 27.) 



Closely related to C. gracilis (Saussure), from which it strikingly 

 differs in the larger size, in the antennae being wholly blackish 

 proximad and in the wings being pale infumate. 



Type. — cf ; Ceara Mirim, State of Rio Grande do Norte, Brazil. 

 (Stanford Expedition; W. M. Mann.) [Acad. Nat. Sci. Phila., 

 Type no. 5263.] 



Size relatively large (for the genus) : form depressed: surface polished, vena- 

 tion of the tegmina distinctly raised. Head projecting cephalad of the prono- 

 tum for its full width; occipital outline truncate when seen from the dorsum; 

 surface of the occiput rugose : interspace between the eyes equal to one and one- 

 half times the greatest depth of the eye; antennal scrobes more distant than 



TRANS. AM. ENT. SOC, XLII. 



