74 BULLETIN (13, UNITED STATES NATIONAL MUSEUM. 



Forma emarginata. — Thorax ({luidrate, apex distinctly emarginate, 

 angles subacute and somewhat prominent anteriorly. 



Measurements. — Males: Length. 16-19 mm.; width, 6-7 mm. Fe- 

 Tnales: Length, 18-23 mm.; width, 8-10 mm. 



Anomaly. — The specimen described by me * as interrwpta belongs 

 here. The prothorax has the side margin at middle rather abruptly 

 interrupted. The elytra has the disc sulcate posteriorly. Length, 

 16.6 mm. ; width, 7.1 mm. 



Genital eharaeters^ male. — Edeagophore (Plate 2, fig. 1) elongate- 

 ovate to fusiform, and more or less arched. 



Basale feebly oblong-oval to oblong; surface evenly convex; sides 

 feebly arcuate, sometimes converging slightly toward the apex. 



Apicale triangular, slightly elongate; surface moderately and 

 evenly convex, with a median longitudinal grove in apical half, 

 sometimes extending from apex to base, slightly dilated and mem- 

 branous apically, gradually narrowing to become linear basally; 

 sides moderately and evenly arcuate in basal half, thence rather 

 feebly sinuate to apex, the latter subacute; base rather broadly lobed 

 at middle and feebly sinuate laterally. 



Stertiite (Plate 2, fig. 2) transversely parabolic. Each lobe more or 

 less subparabolic in outline; external border straight to evenl}^ 

 arcuate, the apex being continuously but more narrowly rounded, 

 angle sometimes evident ; internal border quite short and feebly 

 arcuate; surface scarcely convex, sparsely punctate and setose in 

 apical three-fourths, setse rather long on the apical border. Mem- 

 brane distinctly aud sparsely setose at the bottom of the sinus, the 

 latter short. 



Female. — Genital segment (Plate 2, fig. 8) quadrate, moderately 

 explanate laterally and setose. 



Valvula. — Dorsal plate oblong, moderately narrow, sides subpar- 

 allel; surface plane, glabrous, sparsely punctate, impunctate at basal 

 third, setose, setse moderate and reclining ; external border straight to 

 feebly arcuate, continuously so with the more strongly and evenly 

 rounded apical border, which is more or less inwardly oblique; in- 

 ternal lobe short and separated from the external by a small sinua- 

 tion ; external lobe set with rather long seta\ the internal with a 

 few rather short ones; internal border slighth^ sinuous. 



Appendage just visible from above, short mammilliform, with a 

 pencil of seta^ at ti]). Fossa moderate and in the internal wall of 

 the external apical lobe. 



Basal prominences scarcely evident. 



Svperior pudendal memhrane longitudinally rugulose, reaching 

 about to the internal lobe of the apex. 



« Ent. News for Dec, 1902. 



