314 J. K. MALLOCH. 



— Arista tapering, almost l)are, the pubescence never distinctly longer than 

 the basal diameter of the arista; cheek distinct, though not Ijroad. 



19. prolifica n. sp. 



21. Cheek produced into a distinct })oint anteriorly 20. atujidiceps n. sp 



— Cheek not angularly i)roduced anteriorly 22. 



22. Mesonotum with three pairs of dorso-central bristles 21. (iliend n. sp. 



— Mesonotum with two pairs of dorso-central bristles 23. 



23. Fore tibia with a distinct setula on the posterior side at aliout the middle.. 24. 



— Fore tibia without such bristle 25. 



24. Halteres entirely black 22. setigera n. sj). 



— Halteres lilack, the apical part of the knob pale yellow. 23. variihaltemta n. sp. 



25. Subopaque black species; frons buccate ; last section of fifth vein subequal 

 with last section 24. Sauteri n. sp. 



— Shining black species ; frons not buccate 26. 



26. Frontal triangle subshining : penultimate section of fourth vein subequal 

 with the preceding section 25. suhfusca n. sp. 



— Frontal triangle gkissy ; penultimate secti(Hi of fourth vein shorter than pre 

 ceding section 27. 



27. Small species, 1 — 1-75 mm 26. atofudla n. sp. 



— Larger species, 2"5 — 2'75 mm 27. nigrisquamd n. sp. 



1. Agromyza pusilla Meigen. 



Afjroinyza pusilla Meigen, Syst. Beschreib., vol. 0, 1830, p. 185, species 60. 



Specimens of this w^idely (listril)uted species are amongst the material 

 before me from the following localities, Tainan, Takao and Taihoku. 

 Nine specimens in all. 



2. Agromyza subpusilla n. sp. 



Male: Yellow, subopaque. Head and all its parts, except the vertex 

 and back, as well as the ocellar region, which are blackish, yellow. Meso- 

 notum opaque, grayish-black on disc, the marking resembling that on the 

 thorax of melampyya Loew, but the posterior yellow excisions not so clearly 

 defined; the central one represented in type l)y a triangular mark; pleurae 

 with a slight darkening above fore coxa, and a large blackish-gray mark 

 between mid and hind coxae; scutellum blackened on each side at base; 

 postnotum gray, yellow just below scutellum. Al)domen brownish, the 

 posterior margins of all segments yellow. Legs yellow, tibiae and tarsi 

 slightly browned. Wings clear, veins black-brown. Squamae yellow. Hal- 

 teres yellow. 



Orbits with four pairs of bristles, which are rather w'eak, and decrease 



