SUBFAMILY I. TETRIGINJE. 175 



tatus but larger, more robust and with the furcate frontal costa 

 and characters of vertex of Neotettix. It may be considered a 

 connecting link between the two genera. 



Fox (Ms.) states that about Clarksville, Tenn., C. proavus is 

 found "in May and June in more or less open sun-lit areas on 

 mossy, grassy or leaf-covered ground in upland or hillside woods, 

 occurring in much the same type of surroundings as Spharagenion 

 ItolU, Mela no-plus sciidderi and Melanoplus I it rid us. It is decided- 

 ly local or sporadic in its occurrence." He has described (1918) 

 a long-winged or caudate female form of proavus found at Clarks- 

 ville, having the tegminal sinus clearly defined and the tegmina 

 quite well developed and plainly visible. 



IV. PARATETTIX Bolivar, 1887, 270. (Gr., "near" + Tettix.) 



From the other grouse locusts the members of this genus may 

 be readily know T n by the vertex being short, narrow, never wider 

 than one of the eyes and not extending in front of them (Fig. 4), 

 its front margin truncate and disk concave each side of the median 

 cariua; frontal costa prominent between the antennae, feebly sin- 

 uate between the eyes which are prominent and subglobose; an- 

 tennae filiform, a little longer than head, 14-jointed; pronotmn 

 with dorsal surface flattened, convex between the shoulders, its 

 front margin truncate, advanced forward upon the head to eyes; 

 its posterior process usually prolonged, the median carina low; 

 tegmina oval or elongate, punctate ; wings usually fully developed, 

 rarely abbreviated ; hind tibia? with their apical third gradually 

 enlarged and spinose; first joint of hind tarsi longer than third, 

 pulvilli of second and third joints covered with numerous fine 

 points or spicules. 



KEY TO EASTERN SPECIES OF PARATETTIX. 



a. Pronotum longer, its apex subulate, usually much surpassing the tips 



of hind femora, its median carina feebly elevated throughout its 



length. 73. CUCTTLLATTJS.. 



OCT. Pronotum shorter, its apex acute, not reaching tips of hind femora, 



its median carina distinctly elevated throughout. 74. TOLTECUS. 



73. PARATETTIX CUCUIXATUS (Burmeister), 1838, 658. Hooded Grouse 

 Locust. 



Moderately robust, the pronotum smoothly and evenly granulate. 

 Color usually a uniform yellowish-gray, sometimes russet-red or dull 



36 As Hebard (1919) has shown, the Cavotettix aptcrus Hancock (1918, 345) is a mere 

 Form of N. praams. It was described from specimens of proai'ns taken by Fox at Clarks- 

 nlle. Tenn., and now in my collection, the differences pointed out by its author being based 

 upon the printed descriptions of proai'its and not by comparison with the type of that 

 species. 



