RHYPHUS. 341 



tip of the wing ; subapical ending at a little behind the tip ; praebrachial 

 and pobrachial forked, the hind fork of the latter forming the subanal ; 

 anal complete ; subaxillary nearly reaching the border. Areolets six- 

 teen, the humeral, the radical, the subcostal, two radial, the cubital, 

 the prsebrachial, the pobrachial, which is shorter than the prsebrachial, 

 the discal, four externo-medial, the anal, the axillary, and the subaxil- 

 lary. Posterior margin much excavated at the base. Halteres mode- 

 rately long. Abdomen cylindrical, with seven segments, about twice 

 the length of the thorax. Legs slender, moderately long ; hind tibias 

 with very minute apical spurs. Male. Eyes connected above. Fern. 

 Eyes with a space between them. 



The Rhyphi, like most other Nemocera, are gregarious in their 

 aerial flight, and pair in the air. They feed on over-ripe fruit 

 and on other vegetable substances. The larva inhabits dung ; it 

 is cylindrical and very long; the mouth contains two tentacular 

 mandibles, and the tip of the abdomen has four short, very small, 

 obtuse tubercles. 



1. nigricans, L. F. S. 553.- 2310 (1761); Blanch.; fuscatus, F. ; 

 Gmel. ; Meig. ; Mcq. ; Gimm. -fuscus, Meig. Kl. Cinereus, antennis 

 nigris, thorace vittis tribus nigris subcinereis antice fusco maculatis, 

 abdomine vitta dorsali nigra suturis luridis, pedibus testaceis, femoribus 

 tibiis tarsisque apice nigris. Long. 3-4 ; alar. 6-8 lin. 



Grey. Antennaa black. Thorax with three broad black stripes. 

 Wings greyish, with brown spots in front, none at the tip ; veins black, 

 testaceous at the base. Halteres testaceous. Abdomen with a black 

 dorsal stripe; hind borders of the segments lurid. Legs testaceous; 

 tips of the femora, of the tibiffi, and of the tarsi, black. 



Generally distributed; pairs in the autumn. (E. S. I.) 



2. cinctus, F. Sp. Ins. ii. 407. 41 (1781) ; Gmel.annulata, L. 

 fenestralis, Scop. ; Latr. ; Meig. ; Lam. ; Curt. ! B. E. 102 ; Mcq. ; 

 Guer. ; Gimm. nebulosus, Meig. Kl. ochraceus, Curt. Testaceus, 

 capite antennisque nigris, thorace vittis tribus nigris, alls subcinereis 

 maculis anticis unaque apicali fuscis, abdomine lurido fasciis nigrican- 

 tibus, pedibus testaceis, femoribus tibiis tarsisque apice nigris. Long. 

 3-4 ; alar. 6-8 lin. 



Testaceoiis. Head and antennas black. Thorax with three black 

 stripes. Wings greyish, with brown spots in front, and with one brown 

 spot in front of eacJi tip ; veins black, testaceous towards the base. 

 Halteres testaceous. Abdomen lurid, with blackish bands. Legs tes- 

 taceous ; tips of the femora, of the tibia?, and of the tarsi, black. 



Generally distributed ; frequents windows. (E. S. I.) 



