8 PEOCEEDINGS OF THE NATIONAL MUSEUM vol.72 



2, 1; pteropleural, 0; scutellum with 2 lateral, 1 discal, scars of 

 minute apical pair; prosternum bare. Hind calypter of good size, 

 bare, a group of minute setules beneath it. 



Abdomen ovate, with weak bristles ; none on first segment, second 

 with weak marginal pair, no discals; third with marginal row of G 

 rather strong and some irregular bristly discal hairs; fourth seg- 

 ment with marginal row and a few small irregular on disk. Basal 

 sternite visible, the others covered. Middle legs missing, hind tibia 

 with very sparse and irregular cilia. 



Wing subhyaline, fourth vein a little curved backward, the bend 

 rounded and rather close to hind margin; first posterior cell open 

 only slightly before extreme apex; third vein with 3-5 setules at 

 base, all the other veins bare, including stem vein. No costal spine. 

 Hind cross vein nearly three-fourths of the way from small cross 

 vein to bend of fourth. 



Head yellow, only the upper two-thirds of back, vertex, arista, 

 and third antennal joint except base, black; cheeks with pale yellow 

 hair, the bristles of epistoma beginning at about the middle. Tho- 

 rax black, rather uniformly cinereous poUinose, scutellum concolorous. 



Abdomen yellow with median black stripe as wide as the distance 

 between the two largest scutellar bristles; this stripe widens on 

 posterior half of second segment into a flat triangle almost reaching 

 the sides; on the third segment it forms a larger triangle covering- 

 all but the outer front part; fourth segment wholly black above 

 except narrow margins. Venter yellow with some brownish stains. 



Legs yellow except tarsi, which are black. 



Length, 9 mm. 



I can find no near relative in the United States National Museum, 

 but I venture to suggest Booponus intonsus Aldrich as having some 

 similar characters, including bare prosternum. 



85., ACHAETONEURA LATA Wiedemann 



Taohina lata Wiedemann, Auss. Zweifl., vol. 2, 1830, p. 322. 

 Achaetoneura lata Braueb and Bergenstamm, Denk. Wien. Akad. Wiss., 

 vol. 58, 1891, 334. 



One female, labeled "lata Wd. Coll. Winthem," and "lata Wd., 

 Montevideo." Although Wiedemann stated that the type was in his 

 own collection, Brauer at the very beginning of the series entitled 

 " Zweifliigler des Kaiserlichen Museums " has explained that many 

 of the types were in some way transferred from Wiedemann's to 

 Winthem's collection. There is no reason to doubt that this specimen 

 is the type of lata, although there are slight discrepancies in both 

 existing descriptions. 



