6 PROCEEDINGS OF THE NATIONAL MUSEUM vol. G8 



Genus CAMPTOPROSOPELLA Hendel 



As there are several new species of this genus amongst the material 

 before me, I present a complete key to the species of the genus 

 known from the New World. 



KEY TO SPECIES 



1. Wings largely or entirely fuscous brown, or with clear-cut dark 



markings 2 



Wings hyaline or slightly yellowish 3 



2. Wings almost entirely fuscous brown ; dark brownish species. 



dolorosa Williston. 

 Wings with clear-cut dark markings ; testaceous yellow species. 



maculipennis Malloch. 



3. Thorax and abdomen black ; third antennal segment black, atra, new species. 

 Thorax and abdomen entirely or almost entirely yellow ; third antennal 



segment black at apex only 4 



4. Palpi entirely yellow flavipalpis, new species. 



Palpi black at apices 5 



5. Abdomen with a large black spot on each side of third and another on 



fourth tergite ; prescutellar acrostichals absent latipunctata, new species. 



Abdomen without black spots 6 



6. Arista more sparsely plumose above vulgaris Fitch. 



Arista densely plumose above ^ verticalis Loew. 



CAMPTOPROSOPELLA ATRA, new species 



Male and female. — Head yellow, ocellar spot and third antennal 

 segment black, palpi fuscous. Thorax and abdomen shining black. 

 Legs tawny yellow, coxae, mid and hind femora almost entirely 

 blackened, fore femora less so. Wings slightly brownish. Halteres 

 fuscous. 



Ocellar bristles about as large as the postverticals and incurved 

 anterior orbitals; third antennal segment not much tapered apically, 

 fully twice as long as its basal width; arista moderately densely 

 plumose. Prescutellar acrostichals small. 



Length, 2.25 mm. 



Type and 2 faratyyes. — Higuito, San Mateo, Costa Rica (P. 

 Schild). Cat. No. 28440, U.S.N.M. 



The only known black species of the genus. 



CAMPTOPROSOPELLA LATIPUNCTATA, new species 



Female. — Shining tawnj^ yellow. An oval spot over ocelli, apices 

 of third antennal segment and palpi, and a large spot on each side 

 of third and another on fourth visible tergite, black. Fore tarsi 

 brownish. Wings yellowish. 



Frons half of the head width; ocellar and postvertical bristles 

 fine and not very long; third antennal segment fully 2.5 as long as 

 wdde; arista as in vulyaHs Fitch. Thorax without prescutellar 



