ORTALIDiE — STICTOCEPHALA. 137 



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inner vertical bristle is inserted. The two superior hairs upon 

 the sides of the front are prolonged and incrassated to the size of 

 distinct bristles; above the two spots upon its middle, the front 

 has no hairs, besides these bristles; below the spots, however, the 

 front is beset with erect black hairs, inserted upon hardly per- 

 ceptible dark dots. Antennae ferruginous-brown, more distinctly 

 ferruginous on their inner side towards the basis; the third joint 

 round, black towards the end. Arista slightly incrassated at the 

 basis and blackish-brown upon the incrassation, then pale yel- 

 lowish and again darker towards the end. Thorax covered with 

 a white-grayish pollen and with a brownish-black punctation and 

 picture; the latter consists often regularly arranged spots upon 

 its disk, and of a longitudinal stripe on each side, which begins 

 at the anterior end and reaches up to the root of the wings; the 

 picture of the pleuras consists of two irregular longitudinal stripes; 

 the pectus is neither punctate nor pictured, and the pollen upon 

 it is not equally distinct when viewed from different sides. The 

 rather turgid scutellnm has a brownish-black picture, the whitish- 

 gray pollen remaining visible on the lateral corners and at the 

 end only. The abdomen agrees with the thorax in its coloring 

 and has, besides the punctation, a regular and elegant brownish- 

 black picture, which is more fully developed in the female than 

 in the male; it consists of two small, approximated longitudinal 

 stripes in the middle of 'the abdomen, which begin at the 

 posterior end of the second segment and end at the posterior 

 end of the fourth segment; on both sides of these stripes, between 

 them and the lateral margin, there is a row of conspicuous 

 spots, placed near the anterior margin of the segments and not 

 reaching the posterior one. The first segment of the ovipositor 

 is very broad and broadly truncate at the end ; brownish-black, 

 like the rest of the body; its basis is marked with two very large 

 brownish-black spots, reaching as far as the middle and which 

 have only a narrow stripe between them; the latter, as well as 

 the posterior half are covered with a thin, whitish-gray pollen, 

 and punctate with brownish-black. Feet brownish-black; knees, 

 a rather broad ring upon the middle of the tibiae and basis of the 

 tarsi yellowish. Halteres blackish-brown, the stem, with the 

 exception of its basis, of a dirty whitish. Wings hyaline, viewed 

 obliquely strikingly whitish; all the veins black upon their whole 

 extent. The picture consists of rather numerous black spots, 



