THE CANADIAN ENTOMOLOGIST. 159 



intermediate flagellar segments not very deeply incised; front, 

 vertex and occiput shining yellow, no distinct mark on the vertex. 

 Pronotum yellowish ; mesonotal praescutum orange-yellow with 

 faint indications of darker stripes; a small brown mark in the 

 notch of the transverse suture; scutum, scutellum and postnotum 

 without distinct marks. Pleura light yellow. Halteres brownish 

 yellow, the knobs yellow. Legs, coxae and trochanters yellow, 

 femora and tibiae dull yellow, the tips darker, tarsi brown. Wings 

 subhyaline, the tip broadly but indistinctly suffused with darker; 

 stigma oval, brown; cells C and Sc. a little yellowish. Venation, 

 see pi. XI. fig. 5. 



Abdomen with the tergites yellowish, slightly darker medially 

 and laterally; segments 8 and 9 brown; sternites yellowish. The 

 male hypopygium with the 9th tergite from above (plate XI, fig. 6) 

 with the caudal margin four-lobed, the central lobes on either side 

 of the shallow median notch, these lobes provided with numerous 

 black denticulae; the 9th sternite from below with a broad and deep 

 V-shaped median notch. Outer apical appendages narrow, taper- 

 ing to a very long point; inner appendage with the usual cephalad 

 prolongation, beneath which is a small, chitinized tooth. (See 

 plate XI, fig. 15.) 



Female. — Larger, the abdominal tergites with distinct brown 

 blotches on each segment, these broadest behind, narrowed to a 

 point in the front. 



Holotype, o 71 , Tokyo, Japan, August, 1912 (Vial K). 



Allotype, 9 , Tokyo, Japan, August, 1912 (Vial 42). 



Pachyrhina palloris Coquillett. 



1898. — Pachyrhina palloris Coquillett, Proc. U. S. Nat. Mus., 

 vol. 21, p. 306. 



1902.— P. palloris Kertesz, Cat. Dipt., vol. 2, p. 321. 



1910.— P. palloris Riedel, Deutsch. Ent. Zeitschr., p. 436. 



Two females agreeing rather well with Coquillett's description, 

 but showing the following differences: The median thoracic vitta 

 is bisected from the front by a pale line, making this stripe double; 

 sides of the scutellum brown; the antennae, broken in the type, 

 may be thus described : four basal segments yellow, remaining 



