ADAMS : DIPTERA AFRICANA. 177 



DIOPSID^. 



Diopsis. 



(Linne, Diss. Upsal.; 1775.) 



Diopsis collaris. 



Diopsis collaris Westwood, Trans. Linn. Soc, XVII, 295, 2, tab. IX, fig. 2. 

 One specimen ; October. 



Diopsis concolor. 



Diopsis concolor Westwood, 1. c, 305, 14. 



Three specimens; April and May. 



Diopsis tenuipes. 



Diopsis tenuipes Westwood, I. c, 298, 6, tab. IX, fig. 5. 



Two specimens ; June. 



EPHYDRID^. 



NOTIPHILA. 



(Fallen, Hydromyz,; 1823.) 



Notiphila varitarsis, n. sp. 



Male and female : Front dark brown pollinose, with two 

 fronto-orbitals, a small vertical bristle near upper angle of each 

 eye, ocellar bristles strong ; occiput, cheeks, and face gray pol- 

 linose, cheeks with a strong bristle on lower corner, face with 

 a row of small but distinct bristles on each side ; antennae black, 

 third joint excavated on inner side, arista with ten rays ; pro- 

 boscis brow^nish black, palpi yellow, clavate, with small black 

 bristles. Mesonotum, upper margin of pleurse, and scutellum 

 brownish pollinose, remainder of thorax grayish pollinose, two 

 dorsocentral, one humeral, one presutural, two notopleural, two 

 supraalar, one intraalar, and a pair of prescutellar bristles ; 

 scutellum with a basal and an apical pair of bristles ; halteres 

 yellow. Abdomen brown pollinose, posterior margins of second, 

 third, and fourth segments gra3ash pollinose, broadly inter- 

 rupted in the middle, fourth segment with a short median line 

 of the same color, last segment gray on sides, venter largely 

 grayish pollinose. Legs brownish black, knees, middle tibiae, 

 basal half and extreme tip of hind tibiae, middle metatarsi, 

 hind metatarsi and the following joint, yellow ; middle tibiae 

 with four bristles externally, liind tibiae with eight small ones. 

 Wings hyaline, veins black, hind cross-vein straight and about 



