374 PROCEEDINGS OF THE NATIONAL MUSEUM vol. loi 



densely punctured abdomen. It also differs from most other species 

 of Trachandrena, including the two mentioned above, in having 

 the pygidial plate gently convex, without a median embossed area. 



Female. — Black, the apex of mandibles and small joints of tarsi 

 reddened. Tegulae testaceous-brown. Wings subfuliginous, with 

 stigma and subcosta piceous and the other nervures more red- 

 dened. Pubescence of head dirty white, becoming brownish on 

 apical margin of clypeus and on labrum, and fulvous on lower 

 edge of mandibles. Facial foveae brownish ochreous. Hair of 

 thorax fulvous-red, changing to ochreous on propodeum and under- 

 parts, but the red covering tubercles and area just below base 

 of forewings. This hair rather fine and moderately dense on notura 

 and longer and sparser on the pleura. Abdomen without hair bands, 

 the first four tergites with thin, pale-ochreous or whitish hair at 

 the sides. Apical fimbria dusky fulvous-red, more or less darker 

 than hair of notum, or sometimes brownish, especially in worn 

 specimens. Hair of legs ochreous, the flocculus of hind trochanters 

 more whitish, and the scopa of hind tibiae clear fulvo-ochreous. 

 Hair of front and middle tibiae and tarsi, of apex of hind femora 

 above, of base of hind tibiae on outer side, and of hind basitarsi 

 more or less dark brov/n to fuscous. Process of labrum broader at 

 base than long and narrowed to the rounded apex. Clypeus with 

 strong, very close punctures and provided with a more or less 

 distinct, smooth median ridge. Frons densely, substriately punc- 

 tured. Facial foveae broad above and gradually narrowed almost 

 to a point below, Vv^here they are separated from the eye margin 

 by a narrow shining space. Mesonotum dull, closely and mod- 

 erately coarsely punctured. Basal area of propodeum with irregu- 

 lar, more or less wavy rugae. Abdomen polished, moderately 

 densely punctured, with the punctures of the apical depression 

 of tergites 2 to 4 a little finer and more separated than those of 

 the basal elevation. Punctures of tergite 1 well separated on the 

 disk and absent on basal declivity. Tergite 2 depressed about three- 

 fifths in the middle. Tergites 2 and 3 provided with a rather 

 strong, groovelike basal transverse impression. Pygidial plate nar- 

 rowly subtruncate at apex and gently convex on the disk. Length 

 10-11 mm.; anterior wing 8-8.3 mm. 



Male. — Black, with tarsi dull ferruginous and apex of ventrite 

 6 clear ferruginous. Pubescence ochreous or fulvo-ochreous, nearly 

 uniformly colored throughout, and rather long and dense on head 

 and thorax. Hair of abdomen rather short and erect on disk of 

 tergite 2 to 5, becoming a little dense and depressed at sides of 

 apical margin of 2 to 4, and longer and brighter colored on ter- 

 gites 6 and 7 and usually also across apical margin of tergite 5 (but 



