PROCEEDINGS, 1920 jg 



Rhymosia pectinata sp. nov. 

 Male. Length 4.5 m.ni. Head fuscous, the scape and palpi yellow ; 

 antennae Ij^ times the length of thorax. Thorax dull yellow, dorsum 

 and pleurae brownish, with indistinct darker brown vittae ; scutellum 

 and metanotum fuscous ; hairs yellow, depressed, setae black ; two 

 scutellar setae. Segments 2 to 5 of abdomen with yellow fasciae, 

 cephalad ; these fasciae are widest ventrad ; hypopygium yellow. Coxae 

 and legs yellow, tarsi and tibial spurs brown ; one posterior basal hind 

 coxal seta ; fore tarsal joints on under side serrate. Fore metatarsus 

 slightly longer than tibia. Wing hyaline, subcosta ends in R x- Petiole 

 of media two-thirds length of R-M cross-vein. Cubitus forks under 

 proximal end of R-M cross-vein. Anal vein extends distad of fork of 

 cubitus. Halteres yellow. Savary Island, 9:IV:17. 



Rhymosia brevicomis sp. nov. 

 Male. Length 5.5 m.m. Head fuscous, the scape, aiid palpi yellow; 

 antennae slightly shorter than length of thorax. Thorax dull yellow, 

 dorsum of mesonotum and pleurae fuscous ; scutellum and metanotum 

 fuscous ; hairs appressed, j'ellow, setae black ; 4 scutellar setae ; seg- 

 ments 2 to 5 of abdomen with brown saddles, broadest anteriorly, 

 posterior margins and ventral stripe subfuscous, leaving well marked 

 yellow triangles on sides of segments 3 and 4; segments 1 and 6 dark 

 brown ; hypop^^gium yellow, large, being twice length of segment 6. 

 Legs and coxae yellow ; tarsi fuscous ; one basal coxal seta. Wings 

 yellowish hyaline, subcosta short, ending apparently free though close 

 to Rs. Petiole of M and R-M cross-vein subequal. Cubitus forks 

 proximad of proximal end of R-M cross-vein ; anal vein stout, ends 

 slightly distad of fork of cubitus. Halteres yellow. Fore metatarsus 

 slightly shorter than tibia. Vancouver, B. C, 28:I\':17. 



Tetragoneura atra sp. nov. 



Male. Length 4 m.m. Black, including knob of halteres and hypo- 

 pygium ; antennae black, including basal joints ; palpi black ; middle 

 and hind coxae fuscous, front coxae and femora yellowish brown, tibiae 

 brown, tarsi black ; hairs on thorax and abdomen pale ; wings grayish 

 hyaline, the subcostal vein ends in Rj at nearly two-thirds of distance 

 lietween humeral cross-vein and base of the radial sector ; cubitus de- 

 tached but not attenuated, beginning at a point in line with the R-]\I 

 cross-vein produced. Cell Ri vcr}- little longer than wide, almost a 

 perfect rhombus. 



Female. Like the male but scape of antennae and genitalia are 

 yellow. Cuj slightly attenuated at proximal end. R2-3 wanting in 

 one wing. 



Described from two males and one female taken at X'ancouver, 

 May and June. 



