346 Dr. C. P. Alexander on 



of the cord ; cell 1st M^ ; iu the ends of the anal cells ; 

 in the end of cell Cu^ and very faintly across the posterior 

 cells in alignment ^vith the fonrth and fifth radial blotches 

 described above; reins C, 5c, and /{ yellow; remaining 

 veins dark brown. Venation : Sc^ retracted far back from 

 the tip of *9ci, lying about midway between the origin of Rs 

 and the tip of Sc^ ; Rs long, arcuated at origin; cell R^ very 

 wide at the wing-margin ; basal deflection of Cw, some 

 distance before the fork of 3/, in some specimens this dis- 

 tance being greater than the deflection of Cwj, in others 

 less. 



Abdominal tergites yellow, the intermediate segments 

 with two broad brown cross-bands, one basal, the other 

 postmedial, about equal in width to the yellow apices and 

 much broader than the yellow band between them ; the first 

 segment has only the apical yellow band; the apical seg- 

 ments are uniformly darkened ; sternites similar to the 

 tergites, but the brown markings less clear-cut. Male 

 hypopygiura with the pleurires very long and slender, 

 narrowed to the tij) ; pleural appendages two, the outermost 

 slender, arcuated, chitinized ; inner appendiige longer, stout 

 at the base, narrowed to the tip which is slightly exjiandcd. 

 Gonapophyses in the form of flattened yellow curved hooks 

 that are acutely pointed at their tips. Ovipositor with the 

 tergal valves exceedingly long and slender, slightly npeurved 

 at their tips ; sternal valves long, the tips acutely pointed. 



Hab. West Africa. 



Holotype, S, Lonji, about 50 miles north of Kribi, 

 near the Ulou Kiver, Cameroun, altitude about 1000 feet, 

 July 17, 1919 (/. A. Reis). 



Allotopoti/pe, ? . 



Paratopotrjpe, ^ . 



*' Resting on spider-webs in between the roots of trees." 



r aratropeza {Gymnastcs) tench olaboidcs, sp. n. 



General coloration black, two spots on the vertex, the 

 dorso-pleural membranes of the thorax and the apices of 

 the halteres yellow ; femora with the tips swollen, black, 

 with a narrow sul)apical yellow ring; wings dark brown, the 

 base and two nairow cross-bands hyaline. 



Muh\ — Length about 4*7 mm. ; wing 5 mm. 



Female. — Length mm. ; wing 5 6 mm. 



Rostrum and jjalpi black. Anteniuc black, the fliigellar 

 segments oval. Head black, the anterior part of the vcitcx 

 silvery prninosc and with a large yellowish spot at the inner 



