268 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Seh. 



14. Mcdcterus vittatus, new species 



Male : Length 2 to 2.25 mm. Face dark blue-green below the suture, the 

 suture and above including the front thickly covered with brown pollen; 

 proboscis swollen, shining black, as are also the palpi; antennae small, 

 black, third joint as long as broad, moderately flattened at tip ; arista apical, 

 pubescent ; thorax brown with two, more or less distinct, poUenose vitt<e ; 

 acrostichal bristles in two rows, the space between them a little darker 

 than the rest of the dorsum; prescutellar depression and the pleurae with 

 gray pollen; scutellum black with thin gray pollen and four bristles on the 

 margin, the outer pair the shortest; abdomen shining black with a slight 

 greenish tinge and yellowish hairs, the last segment brownish ; hypopygium 

 (Fig. 8) large, shining black, with a well defined dull area covered with 

 pale hairs on the left side, its appendages black; coxae black; hairs on the 

 fore coxae pale brown, abundant and long ; bristles above fore coxae black ; 

 femora black at base, becoming yellow apically; tibiae and tarsi yellow; 

 extreme tips of tibiae and of the tarsal joints usually brownish; first joint 

 of hind tarsi a little less than half as long as the second; tegulae, their 

 cilia and the halteres whitish ; wings with typical venation ; veins brown ; 

 last section of the fifth vein slightly longer than the cross-vein. 



Female: Agrees with male in all but sexual characters. Ovipositor 

 brown with several slender hairs at tip. 



Described from nine males and four females, taken by me 

 at Kearney, Ont., July 26, Toronto, Ont., Sep. 2, Niagara 

 Falls, Ont., July 20, and Erie Co., N. Y., July 9. 



This is closely related to nigripes Loew but it has quite 

 abundant and conspicuous brown hair on the front surface of 

 the fore coxae, the legs are largely yellow and the first joint 

 of the hind tarsi is somewhat longer in proportion to the 

 second. 



Holotype, male (No. 517), from Kearney, Ont., in collec- 

 tion of the California Academy of Sciences. Allotype, female 

 from Kearney, Ont., in collection of the author. Paratypes in 

 both collections. 



15. Medeterus oregonensis, new species 



Length of male 4 mm., of female 3 mm. Face rather narrow, dark metal- 

 lic blue with a transverse band of white pollen at the suture; front black 

 (the specimens described seem somewhat greasy) ; first antennal joint 

 dark reddish yellow, second and third black ; third joint scarcely as long 

 as wide, rounded at tip, with an apical arista ; proboscis black with a few 

 pale hairs ; lower orbital cilia yellowish white, rather long ; thorax black 

 with brown pollen on the anterior portion of the dorsum and whitish 

 pollen on the posterior depression and on the scutellum. In the male there 

 is a brassy median vitta on the dorsum which extends to the scutellum, 

 three or four black bristles above the fore coxae and two pair on the margin 

 of the scutellum ; abdomen shining with basal third of segments pale green- 

 ish, the apical two thirds more bronze-brown; hypopygium shining black, 

 its appendages black; coxae, femora and tibiae shining black, tarsi dull 

 black ; fore coxae with brownish black hairs and bristles, hairs of the legs 

 dark brownish, in certain lights appearing more reddish. The female has 



