888 Annals of the Carnegie Museum. 



This species is easily distinguished from any known species of Leucophenga by 

 the markings of the wings and by the comparative length between the first section 

 of third vein and the distance between anterior and posterior cross-veins. 



lo. Leucophenga goodi sp. nov. 



Diagnosis: Head and antennae yellow; upper occiput black; palpi 

 black, Mesonotum dark brown, shining, anteriorly with a broad, 

 longitudinal, yellow mark, which extends a little beyond the trans- 

 verse suture. Scutellum opaque, dark brown, with the extreme apex 

 yellow. Legs yellow. Halteres yellowish white. Abdomen black, 

 with basal half above and apex yellow. Wings grayish hyaline with 

 costal and marginal cells fuscous brown; second vein straight. Length 

 2 mm. 



Description: Front yellow, almost one-fourth the width of head. Upper occiput 

 apparently wholly blackish, except a small, yellow spot at vertex (the face can not 

 be well examined on account of some mould). Third antennal joint a little longer 

 than wide and slightly infuscated; arista black with about five rays above and three 

 below. Palpi black, not prominent. Cheeks very narrow. 



Mesonotum (slightly shining) and scutellum (opaque in the specimen) dark brown. 

 The mesonotum in the middle from the blackish spot at neck to a little beyond the 

 transverse suture broadly brownish yellow. The scutellum on apical portion and 

 below honey-yellow and on its sides at base blackish. Sides of mesonotum honey- 

 yellow. Pleura yellow with the dark brown on metathorax extending over the 

 sternopleura. Legs pale yellow with the apical portions of middle and hind femora 

 and tibiae and their tarsi honey-yellow; middle and hind tibiae, at least, with a very 

 minute pre-apical setula. Halteres yellowish white. 



Abdomen black, very slightly shining; with the small first segment entirely, and 

 the second and third (as seen from above), apex of fifth narrowly, and apex of abdo- 

 men pale yellow. I am not certain about the color of the venter on account of the 

 folding of the dorsal segments, but I perceive some yellow. The yellow basal seg- 

 ments appear in certain lights silvery. 



Wings grayish hyaline with costal and marginal cells light fuscous brown, which 

 extends in diluted tint on apical half of the submarginal cell; extreme base of mar- 

 ginal cell hyaline. The third vein ends at the apex of the slightly pointed wing; 

 second vein almost straight; the distance between tips of second and third veins 

 more than two and one-half the distance between tips of third and fourth veins, 

 which are almost parallel in their apical course, but by no means diverging; the 

 distance between anterior and posterior cross-veins is one-third longer than first 

 section of third vein; the posterior cross-vein is not more than two-thirds of the 

 ultimate section of fifth vein; ultimate section of fourth vein is not quite two and 

 one-half the length of the penultimate section; anal vein reaches hardly half-way 

 towards the border of the wing; fourth vein thin in its apical course; veins brown, 

 but the penultimate section of fifth vein more brownish yellow. 



The fronto-orbital, vertical, and ocellar bristles are about of the same size, but 

 the lower reclinate fronto-orbital is slightly the weakest and the inner vertical the 



