186 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.40. 



little longer than the second and nearly as long as the scape and 

 pedicel combined; posterior third of mesonotum with a faint median 

 longitudinal carina, fore wings mostly infuscated, with a whitish 

 fascia extending from near the middle of the anterior margin of the 

 costal cell nearly perpendicularly to the hind edge of the wing; basal 

 third of stigma and about one-fifth of the first cubital cell adjoining, 

 whitish, this latter area comprising the first part of a second fascia 

 which reappears from the junction of the cubitus and the first trans- 

 verse cubitus to the hind margin of the wing; there is a hyaline spot 

 in the marginal cell and the tip of the wing is washed out or almost 

 hyaline; most veins in fore wings brownish, rest of stigma blackish; 

 hind wings colorless except for most of the venation which is stramine- 

 ous; tegulse stramineous; propodeum with the upper aspect sepa- 

 rated from the lateral nearly parallel sided aspects by a longitudinal 

 carina on each side, the lateral areas hardly more than one-fourth 

 the width of the median area at base, the latter with a short median 

 longitudinal carina at base; first dorsal segment almost triangularly 

 produced laterally at base into a kind of buttress, first and second 

 tergal segments dullish, the following segments of the tergum blackish 

 and more or less shining. 



Male. — Similar to the other sex but lacking the lateral processes to 

 the first tergal segment and with the lateral aspects of the propodeum 

 not so well circumscribed. 



Type.— Cat. No. 13489, U.S.N.M. 



Type-locality. — Xalasi (Maputo), Lorenzo Marquez, Portuguese 

 East Africa. 



lieceived from C. W. Howard, by the U. S. Department of Agri- 

 culture, Bureau of Entomology. 



The maculation of the fore wings in this species recalls the Tineoid 

 genus Argyresthia. 



POLYSTENIDEA, new genus. 



May prove to be the same as Polystenus Foerster, to which it seems 

 to be more nearly related than to any other genus. 



Head back of the eyes extending nearly to or a little beyond the 

 eye as seen in profile, antennae not more than 14-jointed; legs slender, 

 basal joint of hind tarsi nearly as long as the next three joints com- 

 bined, disk of propodeum and disk of first dorsal segment approxi- 

 mately equal in length, notauli wanting; abdomen with only four 

 segments visible above. In other particulars very as in Hecabolus 

 Curtis. 



Type. — Polystenidea parksi, new species. 



POLYSTENIDEA PARKSI, new species. 



Male. — Length 2.5 mm. Head black, finely sculptured, rather 

 dullish, as seen from above, extending a little beyond outside line of 



