ADAMS : DIPTERA AFRICANA. 157 



somewhat backward, palpi clavate, bearing a few yellow 

 bristles. Mesonotum shining, bearing short yellow pile, and 

 on posterior two-thirds longer black bristles, pleurae partially 

 covered with grayish pollen, scutellum with an apical pair of 

 bristles and a smaller subapical bristle on either side ; halteres 

 yellow. Abdomen short, contracted, sparse pile yellowish 

 white, ovipositor simple, compressed. Coxae and legs largely 

 shining black, tip of coxae, extreme base and tip of femora, 

 tibiae except broadly in the middle, tarsi except last two joints, 

 of a yellowish cast. Wings hyaline, anal cell wholly absent, 

 first basal cell two-thirds as long as second, first vein joins costa 

 slightly beyond a point opposite apex of second basal cell, third 

 and fourth veins parallel, costa reaches tip of fourth vein. 

 Length, 2 mm. 



Two specimens ; October. 



Elaphropeza. 



(Macquart, Dipt, du Nord de France, I; 1827.) 



Elaphropeza dispar, n. sp. 



Male and female : Shining yellow. Eyes contiguous above 

 and below antennae, slightly emarginate opposite them ; occiput 

 and vertex black, former broad and with fine yellow pile, and 

 a pair of rather strong bristles on top, latter with a forwardly 

 inclined pair of yellow bristles just in front of the ocelli ; first 

 two joints of antennae yellow, second joint with small yellow 

 bristles at apex, third joint lanceolate-elongate, brownish black, 

 arista terminal, about a third longer than the antennae, sparsely 

 pubescent; mouth-parts yellow, proboscis much shorter than 

 height of head, palpi clavate, bearing a few short yellowish 

 bristles. Thorax wholly yellow, sparsely yellow pilose, meso- 

 notum with three yellowish bristles on sides posteriorly, and a 

 pair dorsally just in front of the scutellum ; scutellum yellow, 

 with an apical pair of yellow bristles ; halteres yellow. Abdomen 

 yellow, third segment black, as long as first and second segments 

 together, hypopygium yellow, with yellow pile, lamellae large, 

 median filament arcuate, mostly concealed. Legs yellow, ex- 

 treme tip of femora, tibial and last joint of tarsi brownish, pile 

 yellow. Wings hyaline, veins brownish, anal cell wholly ab- 

 sent, second basal cell twice as long as the first, tip of first vein 



