10 



PROCEEDINGS OF THE NATIONAL MUSEUM 



Caenocholax bassa, new species 



Figures 39-44 



Male: Body light brown, 1.0 mm long; median breadth of hind- 

 wing 1.0 mm and expanse of wings 2.6 mm; width between eyes 0.15 

 mm; length of aedeagus 0.1 mm. Measurements are averages for 7 

 specimens studied. 



Head: With narrow vertex; slender 7-segmented antenna with 

 segment iv extremely small; flabellum of segment in reaching almost 

 to tip of segment vi; vi two-thirds length of vn. Occipital area with 

 pointed anterior margin extending on either side above eyes. Eye 

 with 5 ocelli on inner row visible from dorsal view. Mouthparts with 

 slender saber-shaped mandibles slightly longer than distal segment 

 of maxillary palpus; maxillary palpus with large proximal segment 



,0.1mm 



Figures 39-44. — Caenocholax bassa, new species: 39, hindleg; 40, aedeagus, lateral view; 

 41, maxillary palpus; 42, mandible; 43, body, showing antenna and wing in dorsal aspect; 

 44, detail of abdominal segment x. (Figs. 39-42 use 0.1 mm scale.) 



equal to about one-half length of broad distal one. Both palpus and 

 antennal segments iii-vi covered with minute hairs and sensoria. 



Metathorax: Prescutum with rounded anterior margin projecting 

 beyond tips of scuti and well-defined sutures separating it at some 

 distance from rounded tip of scutellum. Scutellum somewhat shorter 

 than prescutum. Postlumbium wide, semilunar in shape. Post- 

 scutellum with rounded tip and slightly shorter than anterior rneta- 

 thoracic sclerites. 



Hindwing: With 7 main veins; Sc short but distinct; no inter- 

 medials; Mi about one-fourth length of M 2 ; 2 anals. 



