120 EMPID.E. 



Genus XVI. HYBOS. 



HYBOS, Fb. s. a. (1805); LL; Mg.; Fin.; Mq. ; Ct. ; Ahr. ; Gr. ; 



Ztt. Musca p., L. Asilus p., Mbr. ; Gm. ; Shr. ; Fb. Empis p., 



Fb. Dasypogon p., Fb. Stomoxys p., Fb. 

 Corpus parvum, nigrum, subpilosum, incurvum, nitidum, firmum. 



Oculi in utroque sexu conjunct!. Proboscis porrecta, capite longior. 



Antennarum articulus tertius breviter conicus ; quartus setiformis, 



apicalis. Alarum vena cubitalis simplex; vents externo-medice 2; 



areola discoidalis una. Pedes ssepe flavi ; coxa femoribus breviores ; 



femora postica subclavata, subtus spinulosa. 

 Mas. Anus subclavatus. Femora postica valde incrassata. 

 Fcem. Anus acutior. Femora postica modice incrassata. 



Body black, slender, shining, slightly hairy. Head small, round ; face 

 very narrow. Eyes large, dark red, slightly notched internally. Ocelli 

 3, on a tubercle of the crown. Proboscis horizontal, longer than the head. 

 Labrum long, lanceolate, as long as the labium. Lingua setiform, as 

 long as the labrum. Maxillae rudimentary. Palpi fusiform, pubescent, 

 with a few bristles inside, as long as the labrum, detached from the 

 maxillae. Labium long, rather stout, tapering. Antennae 5 -jointed, 

 porrect, approximate at the base, diverging upwards ; first and second 

 joints cylindrical, somewhat bristly ; third oval ; fourth very minute ; 

 fifth setiform, long, pubescent, bare at the tip. Thorax globose, gib- 

 bous, without a suture, somewhat depressed on the hinder part of the 

 back; scutellum lunate, smaH, narrow. Wings obtuse, very finely 

 pubescent, incumbent and parallel in repose; cubital vein simple; 

 externo-medial veins 2 ; discal areolet one. Halteres uncovered. Ab- 

 domen with 7 segments, cylindrical, incurved, pubescent. Legs 

 slender ; ungues and onychia large ; coxa shorter than the femora ; 

 hind legs long, with thick and spinose femora ; anterior tibiae beset 

 with bristles ; hinder tibiae stouter and more hairy ; hind tarsi shorter 

 than the rest ; first joint long, very pubescent beneath. 



Male. Head larger. Eyes parted by a suture. Abdomen clavate 

 at the tip. Hind femora much incrassated. 



"Fern. Head smaller. Eyes parted by a narrow interval. Abdomen 

 more acute at the tip. Hind femora slightly incrassated. 



These flies appear in spring and summer in grassy spots, 

 flowers, on the leaves of shrubs, and especially in woods ; they 

 feed on small Diptera. They move slowly, their flight is heavy, 

 and they often hover in the air. 



1. grossipes, L. s. n. ii. 988. 59 (1767). /b^m, Fb.; LI. ; 

 Fin. ;" Mg. ; Ct. ; Mq. ; Ztt.culiciformis, Fb, ; Gin. ; Shr. ; Mg. 

 kl. clavipes, ~Fb.pilipes, Ct. ! b. e. 661. Nigra, cinereo-suffusa, alis 

 cinereis. Long. 2-2i; alar. 4-5 lin. 



Black, with a cinereous covering, thinly clothed with black hairs. 



