INSECUTOR INSCITI^ MENSTRUUS 179 



pair narrower and better marked. Anal segment and bases 

 of second and third segments pollinose. Tegulse nearly white. 

 Wings clear. 



Ossidingia, new genus. 



Genotype, Ossidingia oniota, new species. 



Head wider than high, moderately long. Clypeiis slightly 

 depressed, wide, but little narrowed above. Epistoma warped 

 slightly, cut off short just below vibrissse. Facialia bare; pro- 

 boscis short; palpi long, subcylindrical, bowed, scarcely thick- 

 ened apically. Second antennal joint elongate, third joint 

 about one and one-half times second. Arista very long, bare, 

 slender. Eyes thickly pilose, descending to vibrissal level. 

 Frontals diverging five bristles below base of antennae. Two 

 verticals, two proclinate and two or three reclinate orbitals. 

 Ocellars present, strong, proclinate. Parafacialia bare. Two 

 sternopleurals, three postsuturals ; acrostichals present. Apical 

 cell open well before tip. First abdominal segment with a 

 median marginal pair ; second with two median marginal and 

 one median discal pairs ; third with marginal row and two 

 median discal pairs ; anal segment sparsely set with bristles 

 over disk. 



Ossidingia ornata, new species. 



Length, 8 mm. One female, Ossidinge, Cameroons. West 

 Africa, June, 1915 (Lieut. A. W. Jobbins-Pomeroy). 



Head silvery-white ; the f rontalia, antenn?e, palpi, spot on 

 vibrissal angles, spot at anterior end of frontal row, broad band 

 across front before ocellar triangle, greater part of occiput, 

 bfoad median vitta of prescutum and oblique oval spot each 

 side of it, narrower median vitta of postscutum and band of 

 confluent spots next suture, base of scutellum, most of first 

 abdominal segment, interrupted median abdominal vitta, and 

 spot on each side of second to anal segments soft brown- 

 black to .velvet-black. Last half of anal segment bright ful- 

 vous-yellow, reducing the black vitta and lateral spots. Legs 

 dark brown, underside of femora silvery. Tegulse conspicu- 

 ously clear honey-golden. Wings clear. 



