34 PEOCEEDINGS OF THE NATIONAL MUSEUM vou6S 



CLASTOPTEROMYIA LONGIPENNIS, new species 



Male. — Head testaceous yellow, the face more whitish ; ©cellar spot 

 fuscous. Thorax more brownish yellow above, pleura much paler, 

 the former with faint traces of two vittae and a mark on each lateral 

 margin behind suture; pleura with two broad dark brown vittae, 

 one on middle of mesopleura and the other on upper margin of 

 sternopleura. Abdomen fuscous. Legs clay yellow. Wings smoky 

 brown. Halteres pale. 



Ocellar bristles long; postvertical pair weak; lower reclinate 

 orbital bristle very small, almost in transverse line with the strong 

 proclinate bristle; eyes almost bare; face with a very slight central 

 carina above; only one strong vibrissa. Thorax with but one dis- 

 tinct pair of dorsocentrals, the intradorsocentral hairs in about 10 

 series. Legs long and slender, fore femur without a comb. Wings 

 elongate, anal angle not developed, general structure similar to that 

 of superha Sturtevant ; inner cross vein a little over one-fourth from 

 base of discal cell ; second costal division fully four times as long as 

 first; third about 1.25 as long as first; first posterior cell a little 

 widened at apex; penultimate section of fourth vein about four- 

 fifths as long as ultimate; outer cross vein about 1..5 its own length 

 from apex of fifth vein. 



Length, 3 mm. 



Ty;?^.— Male. Cat. No. 28473, U.S.N.M. Higuito, San Mateo, 

 Costa Rica (P. Schild). 



The general coloration, habitus, and elongate wings give this 

 species much the appearance of a Curtonotum. It is possible that, 

 with superha^ this species might be subgenerically sparated from 

 Clastopteromyia on the basis of the single pair of dorsocentral 

 thoracic bristles and the lack of a well developed anal angle to the 

 wing, but further study of more material and information as to the 

 habits of the larvae is desirable before such a course is resorted to. 



EXPLANATION OF PLATES 



Plate 1 



Details of Sapromyzidae and Drosophilidae 



Fig. 1, Xenopterella obliqua, wing. 



2, Minettia einttata, wing. 



3, Scut ops fascipenni^, wing. 



4, Scutops macuHpcnnis, wing. 



5, Scutopn fascipennis, head from the side. 



6, Scutopfi maculipcnnis, thoracic markings. 



7, Neoficutops rotundipennis, head from the side. 



8, Neosciitops rotundipennis, wing. 



9, DrosopMla panamensis, wing. 



