563 



Length of metathoracie wing-cases. . .3.5 mm. 



Length of median lobe 1.75-2.0 mm. 



"Width of median lobe 1.25-1.5 mm. 



Described from a single specimen taken at Muncie, III., April 25, 

 1914, and several specimens obtained from Dr. J. G. Needham, col- 

 lected at Galesburg, 111., June 3, 1897. 



Adult; Male. — Color, very dark brown and deep orange-red. 



Head black or dark above, pale below ; labium pale, the median 

 lobe subtriangular, the cleft shallow and broad at the base ; antennae 

 dark brown, the first two segments subequal in length, the first with 

 a pale apical ring; postclypeus dark brown; anteclypeus, labrum, ex- 

 posed portions of the mandibles, their trochantins, genae, and a trans- 

 verse stripe on the front above the fronto-clypeal suture, pale buff, 

 the pale area of the front extending dorsad along the margins of the 

 compound eyes to the level of the antennal fossae ; remainder of the 

 front and vertex very dark brown, nearly black ; occiput and postgenae 

 pale. 



Thorax dark brown to brick-red and yellowish buff; pronotum 

 dark ; proepimera also dark, nearly black ; dorsum of the mesothorax, 

 including the supraepisterna and the epimera and the caudo-dorsal 

 angles of the metepisterna, black or dark brown; remainder of the 

 meso- and metathorax yellowish red ; intersternum projecting ventrad, 

 conspicuous from the side, and provided with long black setae ; legs 

 yellowish buff, the coxae and trochanters yellowish, the femora slightly 

 darker above but without distinct stripes ; tibiae entirely pale and the 

 tarsi pale except at the tips; femora with rounded dorsal carinae; 

 wings with ten postnodal cross-veins in the front wing and about 

 eight in the hind wing; Mo arising between the fourth and fifth post- 

 nodal cross-veins in the front wing and between the third and fourth 

 in the hind one ; stigma reddish, small, surmounting a single cell. 



Abdomen red and black; terga 1-6 dull red, with the exception 

 of small caudo-lateral black spots on the dorsum of 1-6 inclusive, 

 and subapical spots on five and six ; terga 7—10 black on the dorsum, 

 the lateral margins and a broad basal ring on seven reddish ; anal 

 appendages (Figs. 174,178) reddish, the superiors shorter than the 

 inferiors, flat and the dorsal surface depressed ; inferiors longer, acute, 

 subconical, the tips directed dorso-mesad ; apical margins of the tenth 

 tergum emarginate on the dorso-meson and depressed at this point, 

 forming a deep rounded pit. 



Female. — Color in general similar to that of the male but usually 

 considerably lighter. 



