Kahl: The Dipterous Genus Leucophenga Mik. 389 



strongest; the upper reclinate fronto-orbital bristle is quite remote from the vertex 

 and distinctly nearer to the lower reclinate than to the inner vertical and slightly 

 lower down than the lower ocellus; postverticals very minute, strongly convergent; 

 the anterior dorso-central bristle is weaker and much shorter than the posterior and of 

 same size as the prescutellar pair, which are situated a little nearer to the scutellum 

 than is the posterior dorso-central; the minute presutural is difificult to distinguish 

 from the setulae of mesonotum; the anterior supra-alar minute; the posterior post- 

 alar very minute (seen distinctly, however, on the left side of the specimen) ; of the 

 four scutellar bristles the apical pair are missing, but the scars left indicate their 

 existence; bristles and setulae black. 



Habitat: West Africa, Cameroons, Lolodorf, Nov. i, 1913, one male, 

 collected by A. I. Good. Carn. Mus. Ace. No. 5263. 



This is the smallest species of Leiicophenga before me and is dedi- 

 cated to my friend. Rev. A. I. Good, through the efforts of whom and 

 his distinguished father, the late Dr. A. C. Good, Dr. W. J. Holland, 

 Director of the Carnegie Museum, has been enabled to so greatly 

 extend our knowledge of the insect fauna of West Africa. 



There are in the collection two other specimens taken by Rev. A. I. 

 Good, Oct. 29, T913, at the same locality as the type of L. goodi, but 

 they are in too poor condition to be properly defined; both are a little 

 larger than goodi. One of the specimens (with antennae and left wing 

 lost) has the mesonotum shining, brownish yellow, with dark brown 

 at neck, and a large spot at the humerus and a large spot before the 

 scutellum dark brown; scutellum shining; metathorax very shining, 

 dark brown; the scutellum yellow below, the brown extends very little 

 on the sides; abdomen has the second and third segments black; the 

 color of the wing appears more intense than in L. goodi; face hardly 

 carinate (this could not be examined in L. goodi). In the second 

 specimen the head is too defective for description; mesonotum and 

 scutellum brown-red, the former unicolor without any darker macu- 

 lation, the latter with its base narrowly darker; abdomen as in the 

 former specimen and so also the wings, but the third and fourth veins 

 appear to be slightly diverging, which could not be clearly defined in 

 the former specimen as its wing is folded a little longitudinally. 



II. Leucophenga ambigua sp. nov. 



Diagnosis: Head yellow with upper occiput black; upper half of 

 fronto-orbital region, ocellar spot, face, and third antennal joint gray- 

 ish poUinose. Palpi yellow, not prominent. Mesonotum and scutel- 

 lum brown-red. Legs pale yellow. Halteres yellow. First and 



ANN. CARN. MUS., XI, 26, OCT. 30, IQI?. 



