402 PROCEEDINGS OF THE NATIONAL MUSEUM vol. loi 



osmioides by the mainly black color. It is similar to A. perplexa 

 Smith and A. viburnella Graenicher in having the broad facial 

 foveae a little separated from margin of eyes, the abdomen finely 

 and closely punctured, the apical depression of tergites hair- 

 less, the basal process of labrum large, triangular, and truncated 

 at apex, but it differs in the dense opaque sculpture of the head 

 and thorax, in the short, nearly straight floccus of propodeum, 

 and in having hooked hairs on the mouth-parts. 



Female. — Black, the abdomen slightly tinged with purplish 

 blue. Mandibles and tegulae rufopiceous, the flagellum reddened 

 beneath, the small joints of tarsi dark ferruginous. Wings dusky, 

 the nervures nearly fuscous, the stigma with a central reddish 

 streak. Head considerably broader than long. Process of labrum 

 large, triangular, and rather narrowly truncated at apex. Anten- 

 nal joint 3 equaling the next three joints together. Maxillary and 

 labial palpi very short. Apical lobes of maxillae and apical part 

 of labium (the prementum) set with stiff", erect hairs, curled 

 over at their tips; the basal joint of labial palpi with a tuft of 

 similar hair on its outer side. Facial foveae about three-fourths 

 as wide as space between eye and lateral ocellus, and extending 

 to level of top of clypeus. Head and thorax opaque, only the meta- 

 pleura and pleura of propodeum shining. Clypeus with dense, 

 obscure punctures; the frons substriate. Mesoscutum and scutel- 

 lum densely punctured, with the basal half of scutellum more 

 shining and sparsely punctured. Mesopleura and dorsal surface 

 of propodeum granular-tessellate. Abdomen dull, with fine, strong, 

 close punctures, which invade the basal portion of the apical de- 

 pressions. The latter minutely tessellate, shining, with the im- 

 punctate, shining portion very narrow on tergite 1, but much 

 broadened in middle on following segments, especially on ter- 

 gite 4. Pubescence cinereous, moderately dense, and rather short 

 on mesonotum. Hair covering dorsal surface of propodeum (ex- 

 cept basal area) nearly as long as that on the mesopleura, hardly 

 curled on each side, where it descends slightly on the pleural 

 surface; the posterior half of the propodeal pleura with a few 

 simple, erect, scattered hairs. Hair on outer side of basitarsi and 

 on front and middle tibiae tinged with brownish fuscous. Hair 

 of hind femora and lower half of tibial scopa white, the upper 

 half of scopa more or less brownish. Scopa moderately compact, 

 with long hairs curling upward from lower side. Flocculus of 

 hind trochanters white, scanty, and rather short. Abdomen 

 without hair bands, the hair short, suberect, and rather dense 

 on disk of segments, becoming longer at basal margin of apical 



