Empididae. 141 



male larger above than below, but wiien the eyes are separated all 

 facets are of equal size. The colour of the eyes is dark reddish or 

 brownish, The usual incisure in the middle of the inner eye-margin 

 is distinct and rather deep. The vertex bears three ocelli, and vertex 

 and frons are short-haired, and the vertex has generally four bristles. 



Fig. 46. Antenna of H. maura. x 70. 



The antennæ are inserted near to each other, about in the middle of 

 the front side of the head ; they are of the length of, or somewhat 

 longer than the head ; they consist of five joints, the two basal joints 

 are short, the third elongated, conically tapering, and compressed, it 

 tapers in such a way, that the upper margin is straight, but the 

 lower oblique or slightly concave; the two last joints form a style, 

 the basal joint of which is quite short, the second long and terminating 

 in a small, bristle-shaped part. The basal joints of the antennæ have 

 short bristles, the other joints are short-haired, the bristle-like end is 

 bare^. Epistoma is generally as broad as the frons, its lower margin 

 slightly thickened. The jowls are very narrow and not descending 

 below the eye-margin. The oral cone is small, but distinct, and al- 

 lows the proboscis to be drawn considerably in. Glypeus consists of 

 two chitinous lists, which are broad above where they meet the 

 epistoma, and continue down on each side as narrow lists. Proboscis 

 is short, from about as long as the head is high to somewhat shorter; 

 it is directed downwards. Labrum is thick and strong, high at the 

 base and three-pointed at the apex; it is semitubular and generally 

 slightly curved with the convex side forwards. Hypopharynx is about 

 as long as labrum, somewhat semitubular or canaliculated, dilated 

 at the apex and pointed; it is curved like the labrum. The maxillæ 

 have a short, blade-like lacinia, not much more than half as long as 

 labrum ; the maxillary palpi are somewhat large, one jointed, curved 

 upwards and truncate at the apex; they have long hairs on the con- 

 vex lower side and among these some, generally one or two, speci- 

 ally long hairs. Labium is in the natural position about of the length 



1 Mik (Wien. Ent. Zeitg. XIII, 1894, 280, footnote; PI. II, Fig. 12) describes the 

 antenna of H. sartor as six-jointed, counting the bristle-shaped terminal part as 

 a joint; 1 have not been able to detect any division between this part and the 

 second joint of the style, even by high magnifying pow^er. 



