258 DAVENPORT ACADEMY OF NATURAL SCIENCES. 



any other genus of this sub-family with which 1 am acquainted, but it 

 is nearest Bootettix. 



LiGUROTETTIX COQUILLETTI, U. sp. FigS. 24a, 24b, 24C. 



Length (male) 14-16 mm. (female) 18 mm. 



Tegmina 1 4-1 6 mm 17 mm. 



Antennae 5 mm 5 mm. 



Post. Fem 8-9 mm 9.5 mm. 



The scutellum of the vertex is somewhat elliptical in shape, with the 

 posterior end open and the anterior margin somewhat encroached upon 

 in some specimens, especially in the female by the lateral foveolse. 

 These are about as wide as long with the narrow end forward, the two 

 being separated at the apex by the width of the frontal costa, which is 

 at this point only a little more than half its width between the anten- 

 nae where it is very slightly expanded. The antennae are scarcely 

 equal to the head and pronotum in length. The pronotum has all of 

 the sulci about equally distinct, and the posterior margin of the disk 

 is much rounded rather than angulate. The whole surface of the pro- 

 notum, but more especially the metazone, is finely tuberculate. The 

 wings are more than twice as long as wide. The posterior femora do 

 not surpass the abdomen. 



In color there seems to be a constant difference between the males 

 and the females, the former being very obscurely maculate so that the 

 appearance is nearly uniform dull brown, with the tegmina rather 

 faintly flecked with somewhat evenly distributed small spots of fus- 

 cous and the posterior femora plainly banded upon the upper surface. 

 The female has the head and face, disk of the pronotum, and the pos- 

 terior femora with the body-color light yellow or reddish brown, mac- 

 ulate everywhere, except on the posterior femora, more or less dis- 

 tinctly with numerous thickly scattered small brown or fuscous spots. 

 The lateral lobes of the pronotum are, in the light colored females, 

 generally much darkened upon the prozone. The tegmina are dis- 

 tinctly spotted with thickly scattered and evenly distributed quadrate 

 fuscous spots. The posterior tibise are dull yellow. 



Described from three males and two females which were collected 

 by Mr. Coquillett (in whose honor the species is named), in Los An- 

 geles county, California. These specimens now belong to the United 

 States National Museum. 



This species is of peculiar interest in possessing the most highly 

 developed musical organ known in the family Acrididce. According 



