1905.] NATURAL SCIENCES OF PHILADELPHIA. 427 



Pronotum slightly sellate ; cephalic margin arcuate with a slight median 

 truncation; caudal margin with a broad shallow angular emargination ; 

 transverse sulci four in numl^er, more impressed in the male than in the 

 female; prozona about twice the length of the metazona in the male, 

 about three times in the female; lateral lobes slightly longer than deep, 

 cephalic margin slightly sinuate, ventral margin strongly emarginate 

 cephalad and rotundate caudad, ventro-cephalic angle rectangulate, 

 ventro-caudal angle strongly rounded; metazona distinctly punctate. 

 Exposed portion of the mesonotum not more than half the length of 

 the metazona. Tegmina very small pads, not exceeding the meso- 

 notum in length. Abdomen slightly compressed and weakly carinate 

 dorsad; apex of the male abdomen erect and partially recurved, supra- 

 anal plate subvertical, cerci narrower in the middle and apically than 

 at the base, the tip curved mesad and subtruncate with a slight caudal 

 blunt process, subgenital plate somewhat bullate with a distinct cingu- 

 late marginal ridge. Prosternum with a blunt swollen protuberance, 

 more apparent than that found in D. miniaiula, no spine present. 

 Interspace between the mesosternal lobes considerably broader than 

 deep, as broad as one of the lobes in the male, slightly broader in the 

 female; interspace between the metasternal lobes very narrow, sub- 

 contiguous in the male. Cephalic femora as long as the pronotum in the 

 female, slightly longer in the male; tibise equal to the tarsi in length; 

 terminal joint of the tarsi considerably longer than the two proximal 

 joints, the whole tarsus three-fourths the length of the tibia. Median 

 limbs as the cephalic but slightly larger. Caudal femora rather slender, 

 more robust in the female than in the male, considerably exceeding the 

 apex of the abdomen in both sexes, greatest width contained four and 

 one-half times in the length in the male, and four times in the female, 

 genicular lobes acute, carinse not serrate, pagina marked as in D. minia- 

 iula; tibise distinctly shorter than the femora, slightly sinuate, very 

 slightly in the female, spines on the external margin four to five in the 

 female, six in the male, on internal margin seven in each sex; tarsi 

 elongate, slender, over half the length of the tibiae, terminal joint very 

 slightly shorter than the proximal two. 



General color above dark oil green. Head with the vertex and fas- 

 tigium pale apple green, the median sulcus slightly marked with a 

 darker tint; face and sides of head dull french green; distinct post- 

 ocular bar blackish ; eyes raw umber ; palpi oil green ; antennae black- 

 ish with the segments tipped with cinnamon. Pronotum with a con • 

 tinuation of the postocular streak blackish, covering the dorsal half of 

 the lateral lobes and extending over the humeral angle to the dorsimi, 

 28 



