1920] Melander: Near die Tetanoeeridce 



307 



surpnsing. Notwithstanding opinions to the contrary. I feel 

 It a safer course to use existing European names for such species 

 rather than to describe as new forms that are specificallv 

 mdistinguishable. 



Table of the Genera of Tetanoceridce. 



Clypeus promment not retractable with the infolding of the proboscis 

 usually chitinized and narrow; first vein ending beyond middle of wing- 

 femora finely pilose, with bristles undeveloped. (Dryomyzina^) 3 



Clypeus vestigial, rarely chitinized, not touching oral margin when" 

 proboscis IS extended; first vein ending at middle of wing; femora 



rn^d^LTong^hTsh'oTefo? ptt°^^'.= '''^'''. °^^""^"^ '" ^^^ --^-^ , 



^' ^ *iti". V tll^}"" ^T'""^ f^S'"'' ^^'^ °i ^"°"^ ^°^* (indistinct in ' Meiina '. ' "^ 

 Ptibera) ; iront without differentiated median polished stripe, except 

 m Ditcenia. (Sciomyzmse) ^ n 



Propleural bristle wanting; front with a distinct polished median stripe' ' ' 

 rarely subshining. (Tetanocerina;) ^ ' g 



3. Wings with costal spines; eyes small, the cheeks broader than the eyes- 



face not excavated m profile; antennae not reaching halfwav to the 

 mouth-opening; scutellum fiat and setulose; pollinose maritime species. 



Costa not spinose; eyes deeper than the cheeks; face SorteTan^d'''''' 

 excavated m profile, the antenna nearly attaining oral margin- 

 scutellum convex and bare ... Hidigm, ^ 



4. Dorsocentrals extending in front of the imperfect suture; 6 scutellars; " 



^ tronto-orbitals; underside of proboscis with saucer-like base; opaque 



black glaucous pubescent maritime species Heterom\za¥a.\\en 



Transverse suture distmct; 2 dorsocentrals present; 4 scutellars; 1 ffonto- 

 orbital; protoscis narrow; middle tibia with posterior bristles; sub- 

 shining reddish woodland species 



5. Veins bare, hairs of first vein microscopic i'rwwv-a Fallen 



6 pS'tT ^^^^^i^r^l obviously hairy. ; ; [NeZltTnakln^S. 



b. i-ront tibiae with 2 approximate preapical bristles; hind femora of both 



sexes beneath typically with an outstanding bristle 7 



Front tibia with 1 preapical bristle; at most the hind' femora of male' ' 

 snort-spinose or hairy o 



7. Arista densely short white plumose ; "face tub ercul'ate above'. 



AricfQ Kic^i^ ^^A 1 1 r Oidematops Cresson 



S ^^f^f .1 K? ^0"g-Pl"mose; face not tuberculate Scioniyza Fallen 



8. Sma , shining black species with polished front and narrow cheeks; legs 



yellow, the front pair largely black and with lengthened coxa. 



Voii^„, +^ , , . Pteromicra Liov 



Yellow to gray opaque or subshinmg, never shining black species, with 

 broader cheeks and shorter front coxa Uelina Desvoidv 



9. Scute lum with 4 bristles (2 in HernUelopteryx iohnsoni):1Z^SST^ 



better developed than in Sepedon; hind femora not much longer than the 

 abdomen; second antennal joint shorter or at least not longer than 

 third, longer only in Dictyomyia ,« 



Scutellum with 2 bristles no ocellar, humeral, presuturahprescutellar ' 

 p eural or abdominal bristles; hind femora greatlv surpassing the 

 abdomen; second antennal joint longer than third;' lunule free. 



10. Third antennal ,oint oval, three times the length of the £c^Jnd; fr^nl""'' 

 more or less constricted toward antenna H 



'li ''"^Tf ^""'"^ ['''■'^'y °\^'' "^"^^'y "^o'"^ o'- Jess triangular, flattened' ' 

 or excised above, the second joint relntively much longer; sides of front 



