Ghrysogaster. 95 



descend only slightly below the eyes ; they are separated from epistoma 

 by an impressed line which generally ends with a small groove or 

 pit; sometimes the line goes a little higher up, separating a narrow 

 eye-rnargin from epistoma, but this eye-margin, which in Chilosia is 

 so characteristic, is here rather inconspicuous and short. The oral 

 cone well developed with the clypeus lying on the front side; this 

 latter somewhat horse-shoe-shaped, consisting of an upper piece sending 

 a thin prolongation downwards on each side. Proboscis shorter or 

 longer; labrum (solstitialis) strong and strongly seniitubular, the apical 

 processes somewhat long, of about equal length, the median and upper 

 lateral fine, thin and with some spines, the lower lateral broad; along 

 the lateral margin of labrum are the usual rows of small warts; 

 maxillæ somewhat short, knife-shaped, with a very long, thin palpus, 

 double as long as the lacinia, it is thickened at the end and thus 

 club-shaped, and its apical part is more or less recurved; it bears 

 some bristles' and is beset with microscopical hairs, and the lacinia 

 with very dense microscopical hairs in longitudinal rows. Hypopharynx 

 lancet-like, pointed, about as long as labrum. Labium with the basal 

 part well chitinised, the labella broad. Thorax rectangular or almost 

 square; scutellum black or æneous, generally more or less marginate; 

 thorax and scutellum without bristles, and scutellum without a fringe of 

 marginal hairs below. Metapleura densely haired with shortish hairs. 

 Abdomen elongate, flat, in the female generally rather ovate, broader 

 than in the male and sometimes rather broad; the ventral segments 

 well chitinised. In the male there are four not transformed segments, 

 the first short. Genitalia as usual turned to the right, ninth segment 

 not large, partly hidden under the fourth ventral segment. In the 

 female there are five visible segments, the fifth somewhat small, the 

 rest are hidden, the last terminates with tvvo lamellæ. Legs of medium 

 length; tibiæ more or less furrowed towards the dorsal side; hind 

 metatarsus a little thickened. The legs not very hairy, the hairs 

 longest on posterior side of the anterior femora; hind femora gener- 

 ally setulose beneath (except in Liogaster); a dense depressed pubes- 

 cence present as usual on the antero-ventral side of the front tibiæ 

 and base of tarsi and on the postero-ventral side of hind tibiæ and 

 tarsal base; middle metatarsi a little setulose beneath. Claws and 

 pulvilli well developed. Empodium very small, bristle-shaped. Wings 

 with the medial cross-vein more or less before the middle of the 

 discall cell; upper marginal cross-vein more or less parallel with the 

 wing-margin or (in Orthoneura) more or less recurrent. Vena spuria 

 very weak, sometimes only just to be traced. Alula well developed. 

 Alar squamula with short, simple or a little flattened hairs, thoracai 



