1914.] 



NATURAL SCIENCES OF PHILADELPHIA. 



145 



Fig. 46. — Dichopetala 

 tauriformis n. sp. 

 Dorsal outline of 

 apex of abdomen 

 of male (type). 

 (X4.) 



caudal margin of the segment arcuato-sinuate, 

 slightly produced mesad into a low truncate lobe, 

 which is the hinge of the supra-anal plate, the 

 latter with the length subequal to the greatest 

 proximal width, lateral margins approximating 

 distad, distal margin broadly V-emarginate, lateral 

 angles slightly acute, from the dorsal surface of the 

 supra-anal plate immediately proximad of the 

 apex is erected a structure like the Greek letter T, 

 but with the cross bar slightly straighter; cerci 

 very complex, having first a semicircular transverse lamellate ridge 

 proximad, distad of which the whole cercus is depressed, obliquely 

 and strongly so toward the internal margin, that which we consider 

 t-he shaft proper directed meso-caudad, narrowing, strongly depressed, 

 the distal extremity bent inward at a right angle, apex acute, tooth 

 developed from the external margin but little distad of the base, 

 depressed proximad, there lamellate, becoming aciculate distad, 



curving dorsad and mesad, as long as the shaft; 

 subgenital plate greatly produced, reaching 

 nearly to the tips of the cerci, lateral mar- 

 gins regularly arcuato-concave, the distal ex- 

 tremity distinctly broader than the median 

 width, distal margin with a decided median 



Fig. \1 .—Dichopetala quadrate emargination, laterad of which the 

 tauriformisn. sp. Ven- • • i r i i. . i 



tral "outline of sub- margm is obliquely truncate, angles acute 



genital plate of male with the immediate angle blunted. Cephalic 

 ^^^ femora subequal to the length of the head, 



pronotum, and tegmina; cephalic tibiae -^ith elliptical foramina. 

 IMedian femora half the length of the caudal femora. Caudal 

 femora longer than the bod}^, moderately inflated, very gradually 

 tapering distad. , 



Allotype : 9 ; same data as the type. 



Description of Allotype. — The following points are those of differ- 

 ence from the type. Head with the occiput more roundly declivent. 

 Pronotum with the dorsum broader, the lateral margins of the disk 

 (which are indicated almost wholly by 

 color) nearly parallel to the transverse 

 sulcus, thence moderately diverging; 

 cephalic margin with the emargination 

 more decided, that of caudal margin less 

 decided; disk with almost no traces of 

 10 



Fig. 48. — Dichopetala tauriformis 

 n. sp. Outline of ovipositor. 

 (X3.) 



