180 



ORTHOPTEROUS GROUP INSARAE 



many more very closely placed teeth than the others, the ventral valves 

 having three series arranged longitudinally but with the individual teeth 

 placed transversely; subgenital plate small, trigonal, impressed, with two 

 converging carinae mesad. Caudal femora about half again as long as the 

 body (exclusive of the ovipositor). 



Paratypic Series. — We have selected as paratypic a series of nine 

 males and three females from Benavides. 



From the apj^ended measurements it will be seen that the size 

 variation is chiefly individual, although the Carrizo Springs speci- 

 mens are somewhat above the average of the others in proportions. 

 Apparently this is in line with a corresponding increase in size 

 in the Carrizo Springs region of other forms, as Dichopetala 

 gladiator, having much the same distribution as the present species. 

 In the case of phantasma our material is too scanty to more than 

 state the probability of such geographic variation. 

 Measuremenls {in millimeters) 



cf Benavides, Texas. 

 Type 



c? Benavides, Texas. 

 Average and extremes 

 of type and five para- 

 types 



Length 



of 

 body 



Length 



of 



pronotum 



cf Katherine, Texas. . . 



c? Katherine, Texas. . . 



cT Carrizo Springs, 

 Texas 



cf Carrizo Springs, 

 Texas 



9 Benavides, Texas. 

 Allotype 



9 Benavides, Texas. 

 Average and e x - 

 tremes of allotype and 

 three paratypes 



9 Katherine, Texas. . 

 9 Katherine, Texas. . 

 9 Carrizo Springs, 

 Texas 



16.6 



17 



(16.6-18.1) 

 14.5 

 17 



20.2 



16.4 



20.7 



19.7 



(17.7-22) 



14.5 



19.8 



19 



Greatest 



dorsal 

 (caudal) 

 width of 

 pronotum 



Length 



of 

 tegmen 



3.9 



(3.8-4.1) 

 3.9 

 4.1 



4.1 



3.9 



(3.9-4.4) 



4.2 



4.2 



2.2 



2.2 



(2.2-2.3) 



2.2 



2.6 



2.8 



2.5 



Width of 



distal 

 fourth of 

 tegmen 



2.4 



(2.2-2.5) 



2.3 



9 9 



21 



20.9 



(19.8-22) 

 18.1 

 21.6 



22.4 



22.6 



21.5 



22.3 

 (21.5-23) 

 22 

 22.4 



24.8 



2.4 



(2.2-2.7; 

 2.4 



2.4 



(2.4-3) 

 2.4 

 2.7 



2.8 



