p. Fifth ventral sclerite of the male either wanting or with the caudal margin straight; presutural intraalar rarely present. (SARCOPHAGINÆ) q. Fifth ventral abdominal sclerite of the male much reduced, the remaining segments with straight posterior margin, overlapping scale-like; in the female only segment one and two scale-like, the others wholly or in part covered; sternopleurals usually three or more. SARCOPHAGA and related genera. qq. Fifth ventral sclerite of the male plainly visible; sternopleurals usually two. SARCOPHILA, WOHLFAHRTIA, _Brachycoma_, _Hilarella_, _Miltogramma_, _Metopia_, _Macronychia_, _Nyctia_, _Paramacronychia_, _Pachyphthalmus_, etc. pp. Fifth ventral abdominal sclerite of the male cleft to beyond the middle; ventral sclerites usually visible, shield-like. _Rhinophora_, _Phyto_, _Melanophora_ RHINOPHORINÆ [Illustration: 164. Glossina palpalis. (×4.) After Austen.] nn. Second ventral abdominal sclerite as well as the others more or less covered, sometimes wholly, by the edges of the dorsal sclerite. o. The presutural intraalar wanting; ventral sclerites two to five nearly or quite covered by the edges of the corresponding dorsal sclerites; base of the antennæ usually at or below the middle of the eye; arista usually plumose; legs usually elongate; abdominal segments with marginal and often discal macrochætæ. DEXIIDÆ