442 



REPORT OF STATE GEOLOGIST. 



LVII. MiOGRYLLUs Saussure (1877). 



Accortliii"? to Sciulder, lliis genus is distinguished from Gryllus by 

 the much smaller size of its representatives, which approximate those 

 of Nemobius in length; in the absence or extremely inconspicuous 

 nature of the hearing organ on the inner side of the fore tibiae; in 

 the unbranched or one-branched mediastinal nerve of the tegmina: 

 in the strictly longitudinal course of the veins on the dorsal field of 

 the female tegmina; in the shortness of the hind tibiae which are only 

 two-thirds as long as the hind femora and armed on each side with 

 only four or five spines, and in the striped or banded summit of the 

 head. 



Five species of the genus are known to occur in the United States. 

 Of these, one has been found in southern Indiana. 



138. MiOGRYLLUS sAUSSURKi (Scuclder). 



Unjllnx ^auxsun'i Scudd., 160, XIX, 1877, 35; Id., 16 1, VI, 1878, 13; 



Id., 188, 19(X), 90. 

 Mio,/ryllux . •<(iu>^siin'i Scudd., 192, IX, 1901, 257. 



Head rather large, shining Ijlack except a yellowish white line on 

 each side of the eyes, extending back to the pronotum; that on the 

 outer side doable the width of the other; in most 

 >pecimens two short whitish lines between these 

 on the occiput. Palpi yellowish, the apical Joint 

 sometimes darker. Antenna? dark brown, paler at 

 liase. I'ronotum broader than long, slightly nar- 

 I'owi'i' l)eliind tlian in front, the anterior border 

 slightly concave, the posterior straig^it; blackish, 

 faintly niotlh-d with yellowish brown, the front 

 margin sonu'times faintly edged willi the same; 

 ihe lower half of the deflected lobes pale yellow 

 edged very nan-0A\]y Ixdow with black, the upper 

 half of the lobes darker than the upper surface 

 and uniform; front and hind margins with a few 

 curved black bristles. Tegmina of the female but 

 litlle longer llian the pronotum, covering about 

 one-third of the abdomen; those of the male cov- 

 ering two-thirds of the abdomen; reddish brown 

 or blackish in color, the humeral angle black; 

 the longitudinal veins and marginal area often 

 paler. Wings almost wanting. Legs either yel- 

 lowish brown or blackish. Hearing organ on the fore tibire fully 

 one-third the length of the tibia^ on its outer face; wanting on its 



Fig. 112. Miogrylius 

 sausHiirei (Scudd.) 

 Female. One and 

 one-third times nat- 

 ural size. (Original.) 



