13 



NOTES ON THE ETHIOPIAN FRUIT-FLIES OF THE FAMILY 

 TRYPANEIDAE, OTHER THAN DACUS (S.L.) (DIPT.).— II. * 



By Prof. M. Bezzi, 



Turin, Italy. 



(Plate I.) 



XVII. Ocneeioxa, Speiser, 1915. 



This genus was recently described by Dr. Speiser and is a very characteristic one, 

 on account of its elongate and slender body and bare 3rd longitudinal vein. The 

 species belonging here, as long ago pointed out by Loew, have a great resemblance 

 to those of the genus Elajpihromyia, but they are at once distinguished by the thin 

 and black occipital row, by the pointed lower angle of the anal cell and by the non- 

 reticulate wing pattern. The genus is evidently allied to Ocneros, but has nothing 

 to do with Rioxa. I will give here some additional details to the short description 

 of Dr. Speiser. 



Head a little broader than high, occiput flat, hollowed above, with less developed 

 lateral swellings ; frons as broad as one eye, a little prominent above the base of 

 antennae ; face concave, with no distinct middle keel, and with rather prominent 

 mouth border ; cheeks linear ; jowls narrow. Eyes of greater size, rounded, nearly 

 as broad as high. Antennae inserted a little below the middle line of eyes, about 

 as long as the face ; third joint 3^1 times as long as the two basal joints together, 

 rounded at tip ; arista bare. Proboscis short ; palpi broadened at end and bristly. 

 Thoracic chaetotaxy complete ; Dr. Speiser has overlooked the very thin and short 

 scp., and the dc, which are placed much behind, only a little before the line of the 

 prsct. Scutellum flat, bare on disc, with distinct lateral keels. Abdomen elongate, 

 not bristly at end ; male genitalia small ; ovipositor swollen, conical, broad, as long 

 as the last three abdominal segments together. Legs rather stout ; front femora 

 with 2-3 bristles ; middle tibiae with one spur ; hind tibiae with an undeveloped 

 row of bristles. Wings very long and narrow with parallel borders ; no distinct 

 costal bristle, or a very thin one ; stigma very long ; 2nd, 3rd and 4th longitudinal 

 veins perfectly straight and gradually diverging outwardly ; small cross- vein placed 

 on the last fifth of the discoidal cell, hind cross- vein straight, perpendicular or oblique 

 outwardly at its upper end, as long as its distance from the small cross- vein ; point 

 of the anal cell longer than the second basal cell ; discoidal cell long, much narrower 

 at base than at end. 



The species are as follows : — ■ 

 1(4). Macrochaetae of head and body yellow ; 2 lower or. ; antennae as long 



as the face, with the third joint 2-3 times as long as the two basal joints 



together ; legs rather stout, the front femora with scattered bristles below ; 



wings very narrow and longer than the body, with no distinct costal bristle, 



very long stigma and long point of the anal cell. 



*For Part I see Bull. Ent. Res. viii, pp. 215-251. 



