92 Orthorrhapha brachycera. 



1. Anthracinae. 



1. Antennæ four-jointed, the styliform part being divided, 



at the apex with a pencil of hairs; metapleura bare. . 1. Argijranioeba. 



— Antennæ three- or four-jointed, the styliform part with 



a small bristle at the apex; metapleura with long hairs 2. 



2. Pulvilli well developed; antennæ three-jointed 2. Hemlpenthes. 



— Pulvilli wanting or at all events very small; antennæ 



three- or four-jointed 3. Anthrax. 



2. Bombyliinae. 



1. First posterior cell closed, anal cell open; metapleura 



with long hairs 2. 



— First posterior cell open, anal cell closed ; metapleura 



bare 6. Phthiria. 



2. Medial cross vein almost at the middle of the discai 



cell, thus the first basal cell longer than the second. . 4. BomhyUus. 



— Medial cross-vein near the base of the discai cell, thus 



the basal cells of about equal length 5. Systoechus. 



1. Apgyramoeba Schin. {Argyromoeha). 



[Anthrax Scopoli 1763.) 



Species of medium size and of deep black coloiir, generally with 

 silvery spots; the wings more or less variegated with black, rarely 

 quite hyaline. Head nearly globular but cut off behind and very 

 deeply excavated, about as broad as thorax; at the hind edge of the 

 excavation there is a dense fringe of hairs. Eyes large, higher than 

 broad, separated in both sexes, but more so in the female than in 

 the male; the posterior eye-margin is emarginate at the sides and 

 from the top of the emargination an incipient dividing line stretches 



some way forwards, but the facets are 

 of equal size. Antennæ inserted in the 

 middle, somewhat distant. Jowls very 

 small, not descending below the eyes, 

 only consisting of a narrow margin. 

 Antennæ four-jointed, the first joint 

 short, cylindrical, the second disciform, 

 the third with a globular, somewhat 

 flattened base suddenly tapering into a 

 Fig. 33. Antenna of Argyramoeba thin, styliform part which bears at the 

 anthrax. X 50. ^pex the last joint, forming a short 



style witti a pencil of hairs at the apex; in the middle of this pencil 

 there is a small style (perhaps a fifth joint). Epistoma short, the 

 mouth aperture large, oblong, stretching up towards the antennæ and 

 pointing somewhat forwards. There is a distinct and not small oral 



