PLATYCNEMA. 229 



limpidis, Jialteribus fulvis apice piceis, pedibus fulois femorihus apice 

 tarsisquefuseis. Long. li-l|; alar. 3| lin. 



Male. Deep black. JVbigs slightly brown. Halteres and legs piceous 

 or almost black. Fern. Black. Wings colourless. Halteres taivny, 

 with piceous knobs. Legs tawny ; tarsi and lips of the femora brown. 



Eare. In the collection of tlie Entomological Club, (E. I.) 



Genus III. PLATYCNEMA. 



Platvcnema, Ztt. d. s. i. 332 (1842). Empis p., Flu. Cyrtoma p., 

 Ztt. i. 1. Atelestus, Wlk. 



Alee areola discali nulla, vena prabrachiali simpUci. Oculi fronte con- 



tigui in utroque sexu. 



Body minute, black, soft, gibbous, pubescent. Head small, globose. 

 Eyes bare, contiguous. Proboscis declining, very short. Palpi com- 

 pressed, incumbent, very minute. Antenna? small, very short ; third 

 joint oval. Costa of the wing distinctly ciliated from the base to the 

 middle; anal areolet short ; prabrachial vein not forked. Hind tibia and 

 hind tarsi broad. Male. Abdomen obtuse at the tip. Fem. Abdomen 

 longer, acute. 



1. pulicaria, Pin. d. s. emp. 33. 44 (1815) ; Ztt. — sylvicola, Wlk. 

 Nigro-cinerea, antennis nigris, alis cinereis, halteribus pedibusque 

 nigro-fuscis, genubus fulvis. Long. |- ; alar. 1^ lin. 



Male. Greyish-black, hairy, hardly shining. Proboscis, palpi, and 

 antennae black ; third joint of the antennas short-conical, a little longer 

 than the preceding ; fourth about thrice the length of all the preceding. 

 Wings grey; stigma brown; veins black, dark tawny at the base. 

 Halteres blackish-brown. Legs blackish-brown, hairy ; knees tawny ; 

 hind tibise much dilated ; hind metatarsi long, dilated. 



Very rare. In the collection of the Entomological Club. (E. I.) 



Genus IV. OPETIA. 

 Opetia, Mg. zw. vi. 357 (1830); Mq. ; Ct. ; Ztt. 



Corpus parvum, elongatum, rectum, subpubescens, opacum. Color 

 niger. Proboscis subexserta. Antenn;ie 5-articulata3, porrectaj, 

 longitudine capitis; articulus primus subcyathiformis ; secundus 

 subovatus ; tertius fusiformis ; quartus minutus ; quintus setiformis, 

 pubcscens. Thorax gibbus. Ala3 incumbeutes ; areola discali 

 nulla, pobrachiali et anaU minutis ; vena prcebrachiali furcata. Alulae 

 minimse, subovata). Pedes subnudi, iuermes, simplices ; tibia) apice 

 spinosa?; tarsi graciles ; metatarsi postioi articulo secundo fere duplo 



