220 C JR. Osten Sacken: Diptera 



The name Xenaspis alludes to the unusual shape of the scu- 

 tellum, I am in doubt about the relationship of this genus. The shape 

 of the scutellum and the smallness of the second basal and anal cells 

 are very peculiar characters. 



Fig. 5. 



Xenaspis polistes. 



Xenaspis polistes n. sp. $5. General coloring hroivnish- 

 yellow, with some brown markings on head and thorax and a 

 longitudhial brown stripe on the abdomen; wings ivith a pale 

 yellowish-brown tinge, 7nore saturate on the anterior side. Length: 

 12—14 mm. 



Head reddish-yellow; a more or less well-marked brown stripe in 

 the middle of the face, does not reach the base of the antennae; bottom 

 of antennal furrows brown; an ill-defined subtriangular brown spot on 

 the front, above the yellowish lunule; a brownish shade on each side 

 of the ocelli; antennae reddish-yellow; palpi brown, reddish at tip. 

 Thoracic dorsum clothed with a short and dense golden pubescence; 

 brown markings, in the shape stripes, are more or less distinct in 

 different specimens; scutellum yellow. Abdomen densely clothed with 

 a golden-yellow pubescence, with an irregular black longitudinal stripe 

 in the middle and more or less distinct lateral stripes of the same 

 color. Coxae brownish; femora reddish-yellow, usually with a brown 

 spot on the underside of the distal half: tibiae and tarsi reddish-brown, 

 the former with some irregular dark-brown lines and marks. Halteres 

 reddish. Wings with a pale brownish tinge, more saturate yellowish 

 between the costa and the fourth vein, darker brownish on the distal 

 half, especially along the third vein. — Two males and five females. 



N a u p cl a. 



0, Sacken, Bull. Soc. Entom. Fr. 10. Aug. 1881. 

 Naupoda is a curious little fly, especially distinguished by its 

 broad and short stature, its flattened head and large development of 

 its basal cells; the second basal cell reaches the middle of the wing 

 and thus crowds out the discal cell, which is reduced to the shape of 

 a square (see fig. 6). 



