312 REPORT OF STATE GEOLOGIST. 



the eyes, feebly or not at all sulcate. Eyes relatively small, not prom- 

 inent. Antennae about as long (male) or two-thirds as long (female) 

 as hind femora, l^ronotum feebly expanding on its posterior half; 

 the disk rounded on prozona, flat on metazona; the front margin 

 truncate, the hind margin broadly -rounded or obtuse angled; the 

 median carina distinct only on metazona, faintly visible on portions 

 of the prozona; tlic ];iitci- about oiu'-fourtli longer than the meta- 

 zona. Tegmina covering half (female) or three-fourths or more 

 (male) of the abdomen,* sub-lanceolate, their inner edges over- 

 lapping. Extremity of male alxlomen well upturned; the eerci 

 straight, about four times as long as broad, the middle third but 

 slightly narroAved, the apical third concave or sulcate, the tip 

 rounded. Furcuhi consisting of a pair of minute, widely separated 

 tubercular tectli. Sub-genital plate longer than broad, the apical 

 margin somewhat elevated. (See Fig. 7, Plate I.) 



Color: Dull grayish brown above, clay yellow below; the male the 

 darker. Occiput fuscous. The usual black band behind the eye, ex- 

 tending along the upper half of lateral lobe of prozona. Tegmina, 

 dull reddish brown, with often a few small fuscous spots on the dis- 

 coidal area. Hind femora dull brownisli yellow, with two broad ob- 

 lique blackish bars on the upper and outer faces; the lower face dull 

 red; the knees black. Hind tibia? cither red or pale green, with a 

 lighter ring near the base; the spines black. 



Measurements: Length of body, male, 17 mm., female, 21 mm.; 

 of antennae, male, 9.5 mm., female, 8 mm.; of pronoturn, male, 4.5 

 mm., female, 5 mm.; of tegmina, male, 7.5 mm., female, 8 mm.; of 

 hind femora, male, 10 mm., female, 15 mm. 



This much described locust is a species of northern range, which 

 has been taken in Indiana only in Marshall and Lake counties. In 

 the former it has been noted only in a low sandy oak woods, border- 

 ing Lost Lake, and just west of the station of Arlington at Lake 

 Maxinkuc'kee. Here among low huckleberry and other bushes it is 

 common from July 15th on, the females, however, far outnumbering 

 the males. Both sexes leap vigorously when disturbed, but often 

 squat close to the ground after being flushed once or twice. In Lake 

 County a few specimens liave been tnken in the sand dune region 

 near Millers. 



* A form {M.f. volaticua) occurs in which the tegmina are broad, sub-equal, and far sur- 

 pass the hind femora. Tt has been taken in Micliigan, but is not, as yet, known in Indiana. 



