254 REPORT OF STATE GEOLOGIST. 



i. Lower margin of lateral lobe of prgnotum straight, 

 its front half not curved upward. Median carina 

 of pronotum about as high on metazona as on pro- 

 zona; its hind notch but little in front of the mid- 

 dle of pi-onotum XXXII. Mestobregma, p. 279 



a. Lower margin of lateral lobe of pronotum with its 

 front half curved upward. Median cai'iua of pro- 

 notum very faint on metazona; its hind notch 

 much in front of the middle, the metazona at least 



one and a half times as long as the pi'ozona 



XXXIII. Trimebotropis, p. 280 

 hh. Antennae of male longer than hind femora, the basal joints 

 strongly flattened. Frontal costa at its widest point 

 above the ocellus narrower, and at the vertex much nar- 

 rower, than the basal joints of antennae 



XXXIV. PsiNiDiA, p. 283 



XXV. Arphia Stal (1873). 



Vertex horizontal, either sub-pentagonal or triangular, its disk 

 with a distinct, usually deep, transverse curved impression a little 

 behind the middle; lateral carinas distinct; the median carina present, 

 but terminating at the impression; the foveote present, rather large, 

 but shallow and more or less rhomboidal. Frontal costa rather 

 broad, strongly sulcatc in the region of and below the ocellus. An- 

 tenna) about as long as head and pronotum together. Pronotum 

 with its front margin bluntly angulate, produced forward upon the 

 posterior third of occiput; the median carina compressed, and higher 

 than usual, not notched by the transverse sulcus; the lateral carina) 

 rounded, distinct only on the metazona. Lateral lobe of pronotum 

 deeper than long, the front margin a little sinuate, the hind margin 

 more or less oblique, the lower margin with its front half curved 

 upward, the posterior angle rather broadly rounded. Tegmina some- 

 what leathery in texture, densely and irregularly reticulate, the 

 apical third only with the cells, or spaces between the venules, dis- 

 tinct; the intercalary vein closer to the median than to the ulnar 

 vein. Inner wings brightly colored, yellow or red at base. Hind 

 femora stout, their basal halves depressed and dilated. Ovipositor 

 with its valves moderately exserted; the upper ones with their apical 

 halves a little inturned and narrowly spoon-shaped. 



Sixteen species are accredited by Scudder to the United States. 

 Of these but two have, as yet, been taken in Indiana. These may 

 be separated by the following: 



