Bombyliidae. 93 



cone on tlie front side of which lies tlie clypeus, stretching from the 

 front edge of the epistoma to the labrum; it is somewhat weai^ly 

 chitinised and more or less divided into two chitinous h'sts: inwardly 

 it is connected with the pharynx. The stipites of the maxillæ he 

 on the posterior side of the oral cone. Proboscis not half as long as 

 the head is high ; labrum pointed triangular. broad at the base, some- 

 what longer than the basal part of labium ; the maxillæ have a long, 

 pointed, somewhat curved lacinia, and a short, club-shaped, one-jointed 

 palpus; hypopharynx pointed, slightly longer than labrum, The 

 basal part of labium short, not much more than half as long as 

 the labella; these are large and show an indication of a division into 

 two joints, they are stretched forwards, but in use they may be bent 

 angularly towards the basal part and they form a disciform plate 

 when spread out. When the mouth parts are not in use, the oral 

 cone is quite withdrawn, and then the proboscis lies vertlcally in 

 the oral aperture with the labella pointing forwards. Thorax al- 

 most quadrate; prothorax distinct, very narrow, forming a peduncle 

 stretching into the deep concavity of the head; at the front end of 

 mesothorax the clothing hairs form a dense fringe. Of bristles there 

 are some above the wing-root which may, I think, be termed noto- 

 pleural bristles on account of their position on the præalar callus, 

 moreover there are postalar bristles and somewhat weak scutellar 

 marginal bristles; the metapleura have no bristles or hairs. Abdomen 

 somewhat flat, consisting of seven distinct, not transformed segments. 

 The male genitalia are symmetricai, they consist of a small eighth 

 segment which is hidden in the foregoing one but is normally shaped ; 

 at its apex there is a small, somewhat triangular piece above, 

 which has a longitudinal suture in the middle and terminates in two 

 small, somewhat diverging styliform processes ; below there is a some- 

 what arched plate with two small lamellæ at the apex ; in the interior is 

 a short, somewhat upwardly curved penis. The female genitalia form 

 an ovipositor, consisting of a large but quite hidden eighth segment, 

 and at the apex of this a small ninth segment which has above on 

 each side a comb of densely placed, straight spines which are recurved 

 just at the apex; the aperture leading to the ovipositor is covered by 

 converging hairs. Legs with bristles on the ventral side of the femora, 

 on the front femora they are small; all tibiæ with bristles which are 

 likewise smallest on the front tibiæ; the posterior tarsi have bristles 

 and are densely pubescent below, the front tarsi have no bristles but 

 have short, erect, delicate hairs above and below. All tibiæ have 

 apical spurs, l)ut they are small on the front tibiæ. The claws are 

 of medium size; there are distinct pulvilli, but the empodium is present 



