1920] Melander: Nearctic Tetanoceridce 321 



Dictyomyia Cresson. 



Dictyomyia Cresson, Trans. Am. Ent. Soc. XLVI, 82 (1920). 



Brown, lower frontal orbits velvety black, a similar orI)ital spot below 

 antennae, both sets irregularly margined with white pruinosity, notum 

 and abdomen with numerous darker dots; legs mostly testaceous; wings 

 with blackish costal margin, roughly with two rows of spots in marginal 

 cell, four in submarginal, three in first posterior, other cells more irregular; 

 mm. Me., Quel).,* Wyom. (Hough). {Tetanocera) ambigua Loew 



Euthycera Lr.trcille. 



Euthycera Latreille Cuvier, Regn. Anim. V, 529 (1829). 

 Liinigera Hendel, Verb. z. b. Ges. Wien. L. 344 (1900). 



Yellowish, face silky white, lunule and 2 orbital spots black, notum with 

 small brown setigerous .spots, scutellum blackish, with velvet black 

 margin and apical white dot; third antennal joint rounded triangular, 

 slightly shorter than the quadrate swollen second joint; wing markings 

 variable, the diluted spots in marginal cell irregular and numerous; 5 to 

 8mm. N. H., N. Y., Queb.,* Ont., Pa.,* N. J., Md., Va., Car., Mid. States, 

 Ind.,* 111., Wise.,* Tenn., Nebr. {Tetanocera flavesce?is Loew, 1847, not 

 Desvoidy, 1830, not even a valid varietv. E. uniformis Cresson, 74. 

 Tetanocera) ' arcuata Loew 



Smiilar; second antennal jomt shorter than third; the diluted spots of marginal 

 cell quadrate and regular, those of submarginal and first posterior "cells 

 rounded. Me., N. H., N. Car. (Cresson, 74) borealis Cresson 



Trypetoptera Her del. 



Trypetoptera Hendel, Verb. z. b. Ges. Wien, L. 352 (1900). 



Reddish yellow, face pale yellow, greatly receding, a brown spot beside 

 antennas, legs yellow, notum not spotted; second antennal joint short, 

 nearly square, third joint short, bluntly triangular; costal border black- 

 ish, reticulations rather close and guttated, about six clear dots before 

 second vein which scarcely reach the costa; anterior crossvein before 

 middle of discal cell; 7 mm. Queb., Vt., N. Y., N. J.,* Pa.,* Md., Va., 

 Mid. States, 111.,* Ind.,* Col., Ut., N. Mex., Wyom.* '{Tetanocera pallida 

 Loew). {Tetanocera) canadensis Macquart 



Hoplodictya Cresson. 

 Hoplodiclya Cresson, Trans. Am. Ent. Soc. XLVI. 67 (1920). 



Legs more or less marked with brown; third antennal joint scimiter- 

 shaped; wing-pattern dark brown, posterior crossvein gently arched; 

 metapleural callosity black; posterior processes of hypopygium small 

 and more or less triangular o 



Legs yellow except the dark tips of the tarsi; third antennal joint with 

 rounded tip; wing-pattern flavous, the pale spots weakly defined, 

 posterior crossvein gently sinuous; metapleural callosity brown; 

 posterior processes of hypopvgium long, paramera large, compressed 



reniform; 7 mm. Mass.,* N. Y.,* Ga. {Tetanocera) setosa Coquillett 



2. In general 4 square spots in marginal cell in addition to other smaller 

 spots, anterior crossvein before middle of discal cell; all femora with 

 3 incomplete dark rings; third antennal joint pointed; 4-5 mm. Cuba, 

 Md., Fla.. La.,* Tex.,* Nev., Cal. {Tetanocera) spinicornis Loew 



In general 5 square spots in marginal cell beyond end of first vein, anterior 

 crossvein at middle of discal cell; posterior femora with a single dark 

 spot underneath just beyond middle, front femora entirely yellow; 

 third antennal joint bluntly pointed; 5-6 mm. Bermuda.* ( Tetanocera 

 kmcaidi Johns., Ann. Ent. Soc. Am. VI, 449, 1913) kincaidi Johnson 



