Dolichopodidae. 285 



small, triangular lobe, interpreted as maxilla, it seems to be a part 

 of labium). Thorax with somewhat numerous, biserial acrostichal 

 bristles of medium length ; there are six dorsocentral bristles, further 

 a humeral, and often a weaker, about two posthumeral, two noto- 

 pleural, a præsutural, (or one posthumeral and two præsutural), three 

 supraalar and a postalar bristle; the front part of the disc has, as 

 usual, short hairs, some of them may be ionger, and especially there 

 may be two or three in a row between the præsutural and the 

 dorsocentrals, and also in front of the dorsocentrals one or a pair 

 may appear, so that we get more than six dorsocentrals; upon the 

 whole some irregularity appears here. The propleura have some small 

 hairs above and longer bristles below. Scutellum bare above, with 

 two marginal bristles and on each side a smaller hair. Abdomen 

 somewhat robust and somewhat flattened; in the male there are only 

 five visible dorsal segments and four ventral, the others are hidden; 

 hypopygium small and imbedded, generally not to be seen; in the 

 female there are five visible abdominal segments. I observed no dot- 

 like impressions on the abdominal segments; hindmarginal bristles are 

 present. The legs are somewhat short and robust, the front and 

 hind femora a little thickened; the tarsi, especially the hind tarsi, 

 somewhat short, hind metatarsus a little longer than the second joint. 

 The coxæ have bristly hairs, the hind coxæ a few (2—3) bristles on 

 the outer side; the femora have longish hairs below in the male, 

 and the hind femora have some preapical bristles above; the tibiæ 

 have long bristles, and they have apical bristles, most numerous on 

 the posterior tibiæ; hind metatarsus without bristles. In the male 

 the front pulvilli are enlarged. Wings of usual shape; the mediastinal 

 vein terminating in the subcostal vein; the discai vein with a slight 

 curve; the posterior cross-vein a little behind the middle; axillary 

 lobe well developed. The last part of the discai vein with a con- 

 vexity on the curve. Squamulæ with a distinct angulary lobe, 

 bearing a long fringe, the inner part of squamulæ with longish 

 hairs. 



This genus is characteristic by the curious similarity of the two 

 sexes; further it is distinguished by the shape of the antennæ, the 

 abdomen of the male with only five visible dorsal segments, the 

 somewhat short and strong legs and the enlarged pulvilli on the front 

 tarsi in the male. 



Of the developmental stages the pupa is described by Snellen 

 van Vollenhoven (Tijdschr. v. Entomol. XX, 1876—77, 56, PI. IV, Fig. 

 1 — 5); it is whitish yellow; the antennal sheaths lie below on the 

 front side of the head and curved down under it, at the base there 



