324 PLATYPEZID^. 



apicali. Ala vena ambiente nulla, cubitali simplici ; areola brachiali 

 utraque et anali completis, hac oblique acuminata, lobo axillari ro- 

 tundato (iu Opetia et Platy enema fere obsoleto). Abdornen segmen- 

 tis sex. 



Proboscis distinct. Antennce with the last joints forming a slender 

 arista, lohich is attached to the third Joint as its tip. TTing tvith the 

 axillary lobe rounded, nearly oljsolete iu the genera Platycnema and 

 Opetia ; cubital vein simjjle ; brachial veins without a spurious vein ; 

 mediastinal vein usually distinct and distant from subcostal, the latter 

 extending far beyond the middle of the costa, (but in Platycnema less 

 distinct and nearer to the subcostal.) 



The species of this family are all of small size. The genera 

 may be thus arranged : — 



'distinct: fforked .... 1. Platypeza. 



Prsebrachial vein < 



tsimple .... 2. Callomyia. 



Discal areolet 



none : fforked .... 4. Opetia. 



. Praebrachial vein < 



[simple .... 3. Platycnema. 



Genus I. PLATYPEZA. 



Platypeza, Mg. ill. mag. (1803) ; Fin. ; Mq. ; Ztt. ; Gr. Dolichopus 

 p., Fb. ; LI. ; Lm. 



Al(e areola discali completa, vena prfBbrachiali furcata, ramo anteriore 



obliquo prope cubitalem exeunte. Tarsi postici compressi. Oculi 



maris fronte contigui, fcem. distantes. 



Body velvety. Head semicirculai-, somewhat depressed in fi-ont. 

 Labrum clavate, very short. Palpi spathulate, pubescent at the tips, as 

 long as the labium. Labium short, cylindrical. Antenna3 6-jointed, 

 small, straight, porrect, approximate ; first and second joints almost 

 cylindrical ; third somewhat longer, elliptical, compressed ; fourth and 

 fifth very small ; fourth apical ; sixth long, setiform. Thorax oval ; 

 scutellum almost quadrate. Wings rather large, incumbent, flat and 

 parallel in repose ; middle transverse vein very near the base ; apical 

 transverse vein formed by an oblique anterior branch of the prabrachial, 

 approaching very near to the cubital at the end, without meeting it. 

 Discal areolet complete. Halteres uncovered. Abdomen elliptical. 

 Anterior legs slender ; hind legs broad, especially the tarsi, whose joints 

 are almost equally long ; first and second somewhat shorter ; fifth 

 slender. Male. Eyes approximate. Fern. Eyes remote. 



The FlatypezcB inhabit woods, and are scarce ; their larvrc live 

 in fungi. 



