!240 REPORT OF STATE GEOLOGlSif. 



noticeably narrower than tlie front and hind margins. Lateral lobes 

 of pronotuin no longer than broad, the front border decidedly ob- 

 lique, and nearly straight; the hind border less oblique and more or 

 less sinuate; the lower margin plainly angulate near the middle. 

 Tegmina and wings well developed, a little shorter or much longer 

 than the abdomen; the former very narrow, the intercalary vein 

 wanting. Hind femora of medium size. 



Twelve species are known from the United States, two of which 

 have been taken in Indinna. These may be separated as follows: 



KEY TO INDIANA SPECIES OF ORPHULELLA. 



a. Vertex of head rectangular in female; a little acute in the male. Fo- 

 veoloo distinct, narrowly triangular. Lateral carinse of proiiotum 

 strongly incurved, the distance between them at hind margin much 

 greater than at front margin. Prozona and metazona about equal. 



Tegmina passing hind femora 30 pelidna, p. 240 



aa. Vertex of head blunt, rounded, obtuse in female, rectangular in male; 

 foveolaj indistinct. Lateral carina? of pronotum less incurved, the 

 distance between them at hind margin being but little greater than 

 at front margin. Prozona longer than metazona. Tegmina rarely 

 exceeding the abdomen 31 speciosa, p. 242 



82. Orphulella pelidna (Burmeister). The Smaller Spotted- winged 

 Locust. 

 Gomphoceru.H pcJidnua Burm., 40, 11, 1838, 650. 

 Stenohnthrm jjdidnu>i Thom., 206, V, 1873, 95; Morse, 98, VII, 1894, 



104. 

 Orphnla pelidna McN., 89, VI, 1897, 234, 235; Bl., 15, XXX, 



1898, 54; Lugg., 84, 1898, 125, Fig. 72. 

 Orphidrlht pelidna Scudd., 1 8 5, XXXI, 1899, 179, 187; Id., 188, 1900, 



24. 

 StenoholJirnx viacall}>enni!< Scudd., 14 1, VII, 1852, 458; Glov. , 62, 



1872, Plate V, Fig. 14; Thom., 206, V, 1873, 87; Id., 2 I I, IX, 

 1880, 88, 102, Figs. 12, IG; Riley, 122, II, 1884, 202, Fig. 282; 

 Lint., 82, II, 1885, 196, Fig. 58; Fern., 53, 1888, 37, Fig. 14; 

 Morse, 92, VI, 1893, 478, Figs. 3, 4; Beut., 3. VI, 1894, 293, 

 Fig. 7, Plate VIII, Fig. 4. 



Orphula murnlipennix Morse, 98. VII, 1896, 326, 408, Plate 7, Figs. 



8, 8a. 

 Slninhnilim.^ propliitpKatx Scudd , 14 1 VII, 1862, 461; Thom., 2 06, V, 



1873, 90. 



Vertex with the margin distinctly raised above the disk; the me- 

 dian carina absent; its central depression removed from the apex 

 one-third to one-fourth the width of the vertex. Antenna^ ])ut little 

 depressed, slightly longer than head and pronotum, the middle joints 

 three to four times as long as wide. Median carina of pronotum cut 



