Dolichopodidae. 207 



nol or ainiost not visible in the males, in the females it is marked 

 off at each side by a little elevation with a notch, and it is generally 

 bent, forming a little angle with the epistoma, and slightly arched; it 

 does not reach the Iower margin of the eyes. The proboscis is not 

 or almost not protruding in the male, a little more in the female; it 

 and the mouth parts are larger and stronger in the female than in 

 the male. Labrum [ueglectns $) is strong, curved a little downwards 

 with the apex; it has a less chitinised median tooth, and somewhat behind 

 a more strongly chitinised lateral tooth on each side, and it is semi- 

 tubular; hypopharynx a little shorter than labrum, elongated triangular, 

 and hkewise with the apex curved a little downwards; the maxillary 

 palpi are oval, squamiform, and have some bristles, especially a 

 stronger at the apex; in the male the palpi are much smaller than 

 in the female (only a little smaller in laesus). The labium has the 

 basal part a little longer than the labella, these latter are broad, with 

 hairs at the margin. Thorax rectangular, but somewhat short, it is 

 high and a little arched above; pro- and metathorax very small, 

 the former with small hairs above ; the acrostichal bristles are 

 biseriai, small but distinct, only in laesus they are very small; 

 there are six long dorsocentral bristles; further there is a humeral 

 bristle, and generally a pair of smaller hairs, a posthumeral, a præ- 

 sutural, three supraalar, much diverging backwards, two notopleural 

 and a postalar bristle; the front part of the disc has only a few 

 very small hairs. The propleura have two or three small prothor- 

 acic bristles. Scutellum is bare with two strong marginal bristles 

 and on each side a small bristle. Abdomen somewhat short and 

 robust, not or slightly compressed; the first dorsal segment is 

 shorter than the following; the first ventral segment exceedingly small 

 and narrow ; in the male there are six visible dorsal segments of 

 about the same length, except the first; on the ventral side segments 

 two to five are normal, the sixth is not chitinised and is folded in, 

 so that the venter here looks as ifexcised; the seventh abdominal seg- 

 ment is small and hidden, Hypopygium small and not pedunculated, 

 it lies at the end of abdomen, curved in under the excision, and as 

 usual with the dorsal side downwards; it is thus more or less hidden, 

 only the base of it with the eighth segment is seen at the end of 

 abdomen; the eighth segment has generally (or ahvays) sorae short, 

 strong bristles ; the hypopygium has the opening lying more posteriorly 

 than ventrally; it has ventral lobes (or perhaps more probably lateral 

 inner lamellæ, as they are somewhat claw-shaped and two-pointed as 

 these organs in Hercostomus), they are directed dorsally, so that they 

 may sometimes be seen below; there are small, hairy outer lamellæ. 



