272 REPORT OF STATE GEOLOGIST. 



Counties. In central Indiana it begins to reach maturity about July 

 20th, from eggs hatched in the spring. Like others of its kind, it 

 frequents only dry, upland localities, being especially abundant in 

 open woodland pastures, timothy and clover meadows, along road- 

 sides and rail fences. The males are shy, usually taking to flight 

 when an intruder is a rod away and moving in a straight line in the 

 direction they happen to be headed, without noise, save the rustling 

 of their wings. The females are very clumsy, being readily picked 

 up with the fingers. I have often placed one of them on the palm 

 of one hand and with the other stroked gently its back and antennae 

 without having it attempt to escape. 



Mating takes place in late August and September, and the males 

 then mostly perish, while the females are to be found much longer, 

 sometimes as late as November 5th. Orange-winged females of 

 rugosus are more common than males; probably one third of them 

 having the wings of that hue. It ranges over the eastern United 

 States east of the Eocky Mountains. 



From the study of type specimens of Sc'udder's so-called H. rarie- 

 gatus and of a large number of examples taken in the field, I have 

 concluded that it is but a little stouter bodied, lighter colored form 

 of rugosus, and have therefore combined the two species under the 

 latter name. Intermediate specimens, varying in length of tegmina 

 and size and position of tegminal spots are common. With numerous 

 examples at hand it is impossible to separate the two forms. 



XXX. DissosTETRA Scudder (1876). 



Body slender, compressed. Vertex with the disk sub-pentagonal or 

 ovate; the front half a little downward sloping, its front margin an- 

 gulate; the lateral carina low; the median carina present but indis- 

 tinct; the foveoljB short, triangular. Frontal costa sulcate, a little 

 narrowed below the ocellus. Pronotum with disk of prozona sloping, 

 that of metazona flat; the front margin truncate, the hind margin 

 obtuse-angled; the median carina high and sharp, and on the meta- 

 zona strongly arched, cut in front of the middle by a deep but nar- 

 row notch; lateral carinas rounded, cut by the principal sulcus and 

 obsolete in front of it. Lateral lobes of pronotum deeper than long, 

 the front margin vertical, the hind margin oblique, the lower margin 

 with its posterior half rounded, the anterior half oblique. Tegmina 

 broad, much excaeding the abdomen; the whole of apical third mem- 

 branaceous; the intercalary vein very distinct and nearly intermediate 

 between the median and ulnar veins. Inner wings long and wide, 



