248 Orthorrhapha brachycera. 



three ocelli and a pair of bristles. The antennæ are inserted near 

 to each other, a little below the middle; they resemble those in 

 Chelipoda and are likewise five-jointed, the two basal joints are short, 

 the third somewhat elongated, pointed ovate and compressed, it 

 terminates with a long, two-jointed arista, the basal joint of which 

 is very small. Epistoma very narrow, a little broadened downwards; 

 jowls not developed. The clypeus is formed of two chitinous lists. 

 Proboscis is short, stretched downwards ; labrum is strong, semitubular, 

 as long as the proboscis; it is high at the insertion, curved a little 

 downwards at the apex and three-pointed ; hypopharynx is as long 

 as labrum, with parallel sides, pointed, and not dilated at the apex; 

 the maxillæ are a little shorter, they are somewhat broad elliptical 

 blades, bearing some hairs and terminating in some bristle-like pro- 

 cesses; the maxillary palpi are one-jointed, club-shaped, and with 

 some bristles. Labium has the labella relatively large, longer than 

 the basal part and cleft to their base. Thorax is rectangular, not 

 much arched above; prothorax is small, but distinctly seen as a neck- 

 shaped part; metathorax small. The thoracic disc has a few uniserial 

 dorsocentral bristles (two, or only one in each row; perhaps the 

 anterior bristle, which is placed inwards to the humeri, does not 

 belong here and in Chelipoda in reality to the dorsocentral bristles); 

 no acrostichal bristles. A notopleural and a supraalar bristle present. 

 Scutellum with two marginal bristles. Metapleura with a few bristles. 

 Abdomen consists of eight segments, but in the male the last are 

 more or less hidden. The exterior genitalia in the male are rather 

 large; they are mainly constructed as in Chelipoda; the two last ab- 

 dominal segments are lower than the others, the genitalia have a 

 large, more or less compressed piece below and above a pair of 

 lamellæ, terminating with some hooks and curved forwards in over 

 abdomen; in the interior there is a curved penis, hi the female the 



Fi^. 110. Winsr of Ph. vocatoria. 



abdomen is pointed, and it terminates with a pair of more or less 

 distinct, styliform lamellæ. The legs are constructed and armed quite 

 as in Chelipoda; the front coxæ almost as long as the femora. There 



