342 BRUES. 



apical joint twice as long as the preceding. Occipital margin with 

 about six long bristly hairs across the vertex and a couple along the 

 inner eye-margin near the top; also with three close to the outer 

 eye-margin near the top. Pronotum distinctly shorter than the 

 mesonotum; polished and faintly shagreened above, on the sides 

 faintly irregularly striated; presternum smooth and polished on the 

 sides. Mesonotum very faintly shagreened, with very faint traces of 

 parapsidal furrows external to the scutellar fovea?; the latter rather 

 large, connected by a very distinct transverse groove. Scutellum 

 shorter than the mesonotum. Mesopleura with its discal fovea 

 large and somewhat nearer to the posterior than upper margin. Pro- 

 podeum margined on the sides, but not behind, where its surface 

 rounds off to the posterior slope. Mesopleura smooth ; metapleura 

 shagreened except at the base which is smooth; metathorax both 

 above and behind very faintly sculptured, nearly smooth. Abdomen 

 slender, nearly as long as the head and thorax together; second seg- 

 ment longest; third nearly as long; following rapidly growing shorter. 

 Legs rather slender except the femora which are thickened, particularly 

 the anterior ones which are fully one-third as broad as long. Wings 

 fully developed, hyaline; radial cell broad, broadly rounded at the 

 tip, scarcely longer, but one-third wider than the closed cubital cell; 

 median cell indistinctly shorter than the submedian; discoidal cell 

 diamond-shaped, the two proximal sides equal, each one-half longer 

 than the equal distal sides; stigma elongate, narrow, with nearly 

 parallel sides. 



One specimen, without number. 



Sierola crastina sp. now 



9 . Length 3 mm. Stout, seemingly entirely aeneous, with 

 somewhat infuscated wings. Head large and stout, thickened antero- 

 posteriorly. Eyes oval, but much more nearly circular in outline 

 than in the preceding species. Head seen from the front as broad as 

 high, the clypeal carina strongly elevated, three-fourths as long as 

 the height of the eye. Eyes pubescent; front shining, scarcely at all 

 shagreened. Ocelli in a rather large triangle, the lateral ones one-half 

 closer to each other than to the eye margin. Occipital margin above 

 with six long bristly hairs, and with several more on each side behind 

 the upper part of the eyes. Antennae short and slender, but little 

 exceeding the head in length. Scape stout, two and one-half times 

 as long as thick; following joints to the fifth flagellar of nearly equal 



