224 RErORT OF STATE GEOLOGIST. 



in the female the tlilTerence is less noticeable. The humeral angles 

 of tlie pronotum are more pronounced and tlie mid-carina is a little 

 more elevated in its anterior portion. 



Forms with both long and short pronotum occur, the varietal name 

 ahhreviatus having been given to the shorter one. In the long ex- 

 amples the pronotum and wings pass the hind femora about 3.5 mm. 



Measurements: Length of body, male, 8.3-12 mm., female, 9-13 

 mm.; of pronotum, male, 8.5-11 mm., female, 8-12 mm.; of hind 

 femora, male, 5 mm., female, 5.5-6 mm. 



This species has been taken only in Marion and Vigo counties. 

 From the latter locality some of Morse's type specimens were secured. 

 It frequents the same localities as T. ornatus, the species to which it 

 is most closely allied. In the localities where it has been found, short 

 forms have, up to the present, proven more abundant than the long 

 ones. It will prol)ably be found to occur more commonly in the 

 northern half of the State, as its range is northerly, being given by 

 Scudder as "Montreal to S. Dakota and Nebraska." 



21. Tettix arenosus Burmeister. The Granulated Grouse Locust. 

 Tetlrix arenosa Burm., 40, II, 1838, 659. 

 Tettu- arenosiis, BoL, 1 9, 1887, 95; BL, 11, XXVI, 1894, 219 (in part) ; 



Scudd., 188, 1900, 16; Hanc, 69, 1902, 68, 85, Plate UI, Fig. 



3; Plato IV, Figs. 5, 5b. 

 Tctti.r unuifa Thorn., 206, V, 1873, 184 (in part). 



Body rather slender; the pronotum everywhere minutely granulate 

 but little rugose or wrinkled. Color grayish or blackish, often with a 

 large squarish white spot on the dorsal surface between the humeral 

 angles; this spot usually with traces of black on its hind margin. 

 Vertex, viewed from above, nearly twice the width of one of the eyes, 

 depressed in front; extending but little beyond the front of the eyes, 

 its front margin subtruncate, the median carina indistinct, scarcely 

 if at all projecting.' Eyes, when viewed from above, prominent. 

 Antennae slender, the joints elongate. Pronotum with its front mar- 

 gin truncate, its posterior portion prolonged, and extending much be- 

 yond the hind femora, its dorsal surface flat, the median carina indis- 

 tinct, scarcely or not at all elevated. Inner wings fully developed, a 

 little surpassing the pronotum. 



Measureinents: Length of body, male, 8 mm., female, 9 mm.; of 

 pronotum, male, 10.5 mm., female, 13 mm.; of hind femora, male, 5 

 mm., female, 5.5 mm. 



This is a common insect in Indiana, especially in the southern half. 

 Specimens in my collection are from Posey, Orange, Crawford, Mon- 

 roe, Vigo. Putiiaiti iiJid Kosciusko counties. From ornaius it may be 



