20 STiiATIOMYIJD.T;. 



2. I'^yes pubescent Acanthina, Wied., 



Eyes entirely bare 3, [p. 26. 



3. Scutellum uuspined, or produced conically 



upwards 4. 



■ Scutellum 2- or 4-spined, never conically 



upturned S, 



4. .Vbdomen elongate, linear, much longer 



than thorax ; antennse conspicuously [Crun., p. 30. 



long, liliforni Sti!ATIosi'1iecomyia, 



Abdomen very short, thick, rounded ; 



antennal 3rd joint rounded or shortly 



elongate, never conspicuously so 5. [p. 21. 



o. Third vein unforked Zabiiachia, Coq., 



Third vein forked 6. ' fp, 20. 



6. Scutellum not upturned Pachygaster, Mg., 



Scutellum distinctly conically upturned . . 7. [p. 24. 



7. Antennpe filiform, longer than head AcBAsmDEA, Eraiier, 



Antennal 3rd joint large, round Monacanthomyia, 



[Brun., p. 23. 



8. Scutellum with two very short spines .... Wallacea, DoL, 

 Scutellum 4-spined 9. [p. 24. 



1). Third antennal joiut with elongate style . . Tinda, Walk., p. 29. 

 Third antennal joint with pubescent arista. 10. 

 ]0. Abdomen barely broader than thorax .... Evaza, Walk., p. 31. 

 .Vbdomeu much broader than thorax .... Craspedometopox, 



[Kert., p. 28. 



Geuus PACHYGASTER, %. 



Pachtjffaster, Meigeu, 111. Mag. ii, p. 266 (1803). 



lappa, Latreille, Hist. Nat. Crust. Ins. xiv, p. 343 (1804). 



Neopachyfj aster, Austen, Ent. Month. Mag. xxxvii, p. 24o (1901). 



Genotype, Nemotelus atra, Panz. ; by origiiial desiguation. 



Read semicircular ; eyes large, contiguous in J' (except in rare 

 instances), practically bare, posterior orbits broad. Proboscis and 

 palpi small and inconspicuous. Autennte short, 3rd joint rounded, 

 with four indistinct anindations and long subapical pubescent 

 arista. Thorax large, broadened hindwards, transverse suture 

 deep, V-sbaped, behind which the surface is .somewhat inflated on 

 each side ; scutellum subtriangular, unspined. Abdomen much 

 l)roader and barely longer than thorax, subglobular, o-segniented ; 

 genitalia small. Legs simple, nearly bare ; femoi-a and metatarsi 

 long. Wings witli 1st and 2nd veins short, the latter ending 

 barely beyond middle of costa ; 3rd vein normally forked, both 

 branches ending well before wing-lip ; discal cell large ; 4tli vein 

 with only two terminations ; posterior cross-vein absent, as 5th 

 vein forms hinder side of discal cell ; anal cell closed far from 

 wing-border. 



liange. Europe, IN'orth America, Orient. 



Life-history. That of several'Europeau species is known. The 

 hirva lives in rotting tree-trunks and probably feeds either on 

 the decaying wood or the frass produced by wood-boring Coleoptera. 



