Manchester Memoirs, Vol xlii. (1898), No. 1. 51 



Prosopis sulcifrons, sp. nov. 



Nigra, nitida, alls fusco-violaceis. 9. Long. 8-9 mm. 



Head shining, the vertex sparsely covered with long 

 blackish, the face more thickly with short white hair ; the 

 face with shallow punctures, the vertex at the sides 

 much more distinctly punctured ; the centre at and below 

 the ocellar region opaque, alutaceous ; the front between 

 the antennae carinate. On the inside, at the top of the 

 eyes is a deep distinct longitudinal suture. The clypeus 

 at the apex roundly, but not deeply, curved. Mandibles 

 entirely black, deeply and widely furrowed on the outer 

 side ; the base alutaceous, the apex shining ; the teeth 

 blunt. A curved, shallow, narrow furrow runs down from 

 the antennae to the bottom of the eyes, bordering the 

 yellow mark ; and, in the centre below the antennae and 

 joining the lateral ones, is a transverse straight one. The 

 flagellum of the antennae obscure-brownish on the under 

 side towards the apex ; closely covered with a pale down ; 

 the scape punctured, scarcely dilated towards the apex. 

 On the pronotum is a yellow line, narrowed and almost 

 interrupted in the middle, dilated on the outer side ; the 

 tubercles yellow, the latter having at their apex a thick 

 mass of pale hair. Mesonotum distinctly, but not deeply, 

 punctured ; there is a central and a lateral narrow, not 

 very distinct, furrow, reaching from the base to the middle. 

 Scutellum punctured like the mesonotum, indistinctly 

 keeled down the middle. Median segment alutaceous, its 

 apex oblique, thickly covered with long white hair. Pro- 

 pleurae sparsely covered with long white hair ; the meso- 

 pleurae bearing all over shallow punctures ; the furrow 

 distinctly crenulated. The central furrow on the median 

 segment, deep, narrow. Legs entirely black, except 

 the spurs which are pale ; the tibiae and tarsi thickly 

 covered with silvery hair, the tibiae especially towards 



