364 Professor Williston on the 



anterior cross-vein, the latter situated at the middle of the discal 

 cell; distance from the anterior cross-vein to the posterior cross- vein 

 more than three times that from the latter to the angle of the 

 fourth vein. Length 9 mm. 



2. 8arcoj)liaga concinnata, n. sp. 



^ . Agrees with 5. otiosa throughout, except that the middle and 

 hind tibise are wholly without the thick long hair on the inner side, 

 and the femora have less hair below. The specimens, moreover, 

 seem to be less thickly haii'y than in that species, and the size is 

 less. Length 9-11 mm. 



With tlie three specimens presenting the above char- 

 acterSj there are four females which may belong with 

 them, but from their larger size, I suspect are S. otiosa. 

 The front is broader than in the males ; there are four 

 well- developed bristles along the orbit and two orbital, 

 proclinate bristles ; the black stripes of the mesonotum 

 seem a little narrower; the fifth abdominal segment is 

 red, the legs are without the long hair, and the claws are 

 a little shorter. It is possible that the species is 

 identical with 8. chrysostoma, Wied. 



3. Sarcoj^haga otiosa, n. sp. 



^ . Front narrow above, at the vertex the width is about equal 

 to the length of the third antennal joint ; at each superior angle of 

 the eyes there is a stout bristle directed backwards ; a little way in 

 front of these there is a siugle, smaller bristle on each side ; along 

 the edge of the frontal stripe, a row of thick-set bristles, short 

 above, but becoming successively longer below. Sides of the face 

 bare, except a row of minute bristles situated close to the eyes. 

 The antennae reach nearly to the stout vibrissse ; arista long and 

 densely plumose. Cheeks light-golden pilose, with a row of black 

 bristles on the inferior margin, reaching to the vibrissce ; vibrissas 

 situated at some distance above the oral margin. In colour, the 

 sides of the front and of the face are opaque, light golden -yellow, 

 the frontal stripe, the antennse, and the vibrissal ridges black, the 

 last gi-eyish pollinose. Stripes of the mesonotum broad and deep 

 black ; mesonotum with abundant black hair, but without bristles, 

 except on the posterior part. Scutellum with three pairs of stout 

 bristles, the apical pair approximated and cruciate. Abdomen 

 marmorate, metallic-black and yellowish-grey, variable in different 



