ENTOMOLOGICAL NEWS. [July, 'l6 



The present insect is very closely related to giganteus, dif- 

 fering chiefly in the distinctly and strikingly more slender 

 form. The less broad pronotmn is much more regularly oval 

 and the marginal fields of the tegmina are distinctly narrower 

 in the present species. 



Both the present species and qiganteus, as far as we arc 

 able to determine from females, agree in the following char- 

 acters: 



Head with interocular width in males from slightly less than to a 

 full one-fourth the interocellar width, in females from one-fourth to 

 one-third the interocellar width. Head shining blackish, the ocelli and 

 soft portion of clypeus buff. Ocelli with flattened surfaces slanting 

 laterad, the inner margins slightly raised above the flattened plane of 

 the space between the ocelli. Tegmina very ample, rounding broadly 

 distad to distinct but not sharply rounded apex which in position is 

 situated slightly nearer the costal margin. Dorsal surface of abdomen 

 in both sexes with sixth segment strongly acute-angulate produced 

 latero-caudad; seventh much narrower across abdomen and but slightly 

 projecting beyond caudal margin of sixth, with small rounded latero- 

 caudal projections; eighth still narrower across abdomen with caudal 

 margin straight ; supra-anal plate strongly quadrate produced, bilobate. 

 Cerci moderately slender, slightly incurved, tapering distad to acute 

 apex, with about seventeen short joints, (in females of giganteus 

 twenty to twenty-two) ; polished and slightly convex above, very 

 hairy and strongly convex below with narrow deep lateral marginal 

 channels. Concealed male genitalia : Mesad, from above a soft sur- 

 rounding mantle, a moderately stout short tapering blunt chitinous 

 projection extends caudad ; the surrounding mantle having the free 

 dorsal and distal margins fringed with small blunt chitinous projec- 

 tions, these longer and more like short blunt teeth of a comb on the 

 sinistral margin. Dextrad of this organ, from a broad chitinous base, 

 a stout subchitinous shaft is directed caudad curving regularly out- 

 ward, the convex surface is subchitinous, the inner surface soft, the 

 apex more chitinous and flattened, broadened and blunt. Male sub- 

 genital plate convex, asymmetrical, distal margin broadly convex from 

 sinistral base to mesal portion of distal half, there rounding sharply 

 into deep concave emargination at dextral base, within which the mar- 

 gin is much softer and subchitinous. Minute slender cylindrical styles 

 present on this margin at the inner bases of the cerci, the sinistral five 

 times as long as broad and situated in a small indentation of the exter- 

 nal surface near the margin, the dextral eight times as long as broad and 

 situated in a more decided indentation of the margin itself. Ventro- 

 cephalic margins of cephalic femora supplied proximad with three or 



