1920] 



Melander: Near die Tetanoceridcs 315 



10. Arista short-plumose; mcsonotum vittate. Eur.;* N. Y.,* Queb.* 



{Sciomvza annulipes Zett. Dipt. Sc. \^ 2113 (1846); Schiner, Faun. 

 Austr. II, 49 (18G4); Hendel, Abh. z. b. Gcs. Wien, II, 26 (1902) ). 



annulipes Zetterstedt 

 Arista bare or microscopically pubescent; mesonotal vittae faint, {vitalis 

 Cresson) 11 



11. Front tarsi entirely black. Mass., Id., Cal. (Cresson, 43). 



var. vitalis Cresson 

 Front tarsi pale at base. D. C, Wise. (Cresson, 44). .var. similis Cresson 



12. Abdomen uniformly reddish, contrasting with the mostly grayish thorax; 



front legs dark brown, posterior legs reddish; arista nearly bare. 

 Eur.;* Id.,* Wash.,* Or. {Sciomvza ventralis Fall. Dipt. Suec. 

 Sciomvz. 14 (1820); Zetterstedt, Dipt. Sc. V. 2112 (1846); Schiner, 

 Faun. Austr. II, 50 (1864); Becker, Act. Soc. sc. Fenn. XXVI, 9, 58 

 (1900); Hendel, Abh. z. b. Ges. Wien, II, 44 (1902). Helomyza fiisci- 

 mana Roser, Wuerttemb. Corrbl. 61 (1840). Sciomvza rufiventris 

 Meigen, Syst. Bes. VI, 20 (1830); Macquart, Suit. BufT. I'l. 408 (1835). 



ventralis Fallen 

 Abdomen nearh' concolorous with the thorax 13 



13. Arista loosely pubescent; incisures of abdomen paler. Eur.;* N. J., Mass., 



Ont., Wise, Cal. (Hough); Queb., 111.,* Nev., Wyom.* (Sciomyza). 



obtusa Fallen 

 Arista nearly bare 14 



14. Wings strongly infumated; blackish species measuring about 3 mm. with 



dark brown legs, the front pair blackish except the coxae; halteres 



black. Pa., L.nt. (Hough); Ind.* (Sciomysa) luctifera Loew 



Wings nearly hyaline, the crossveins lightly infumated; larger species 

 of gray-brown color with fasciate abdomen; front legs black, con- 

 trasting with their whitish coxeb and with the reddish posterior pairs; 

 halteres yellow; antennae black. Wyo.,* Mont.,* Id.,* Wash.,* B. C* 



palustris, n. sp. 



15. Ground-color of wings brown, filled with numerous small rounded hyaline 



spots; body grayish brown, marked with distinct sepia dots at base of 

 each bristle and setula; eyes broader than deep, the head unusually 



wide; arista short-plumose. Tex.* (Sciomyza) guttata Coquillett 



Wings marked with a few short cross-bars; arista pubescent; eyes nearly 



round '. . . 16 



16 About 5 bars crossing submarginal cell, discal cell with a pair of spots; 

 fourth vein emitting appendage into second posterior cell; a small 

 brown dot at base of each thoracic setula; a velvet black mark between 

 antenna and eye. Tex..* Mex. {Sciomyza strigata Wulp, see Malloch. 



Can. Ent. 1914, 324). {Sciomyza) trabeculata Loew 



Only a preapical crossband in the submarginal cell, markings of discal cell 

 obsolete; no appendiculate vein; thorax with alternate brown and gray 

 vittae; at most a brown spot beside the antennas. Eur.;* Mass.,* 

 Ct.,* Ont.,* Queb., N. Y.,* N. J., N. H., Pa., D. C.,* Fla., 111.,* Ind., 

 Wise, Ga. (Hough); La.,* Mo., Tex.,* S. D.,* Kans. (Aldrich), Col., 

 Wyom.,* Mont.,* Id.,* B. C.,* Wash.,* Oreg.,* Cal., Mex. {Sciomyza). 



nana Fallen 



17. Mesopleura entirely pubescent or posterior^ setulose; 1 fronto-orbital, 



sternopleural, 2 pteropleurals, prescutellars strong; oral angle of face 



acute or perpendicular in profile; arista bare, or nearly so 18 



Mesopleura bare; 2 fronto-orbitals, prescutellars vestigial; oral margin not 

 prominent; arista pubescent to plumose; species under 5 mm 19 



18. Mesopleura entirely pubescent; thickened basal portion of arista one- 



third arista-length; abdomen fasciate only; third antennal joint brown; 

 gravish red species; 4 to 5 mm. Eur.; Pa., Fla., 111.,* Wise. (Hough). 

 Ga..* Tex.,* S. D. (Aldrich), Mont.,* Wash.,* Cal.* {Sciomvza 

 grisescens Meigen, Syst. Bes. VI, 20 (1830); Macquart. Suit. BufT. 



