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touch or almost touch for a long space and with a shining black mid- 

 dle space, and only slightly protruding, ^ut that of the female occupying 

 almost fully one-third the width of the head from the vertex to the 

 antennae and usually greyish with a shining black or blackish callus 

 right across the lower quarter (or more than that) close to the antennae, 

 and above that callus with two widely separated rounded dull black 

 spots, and still further upwards with a smaller (often indistinct) dark 

 spot right out on the middle of the grey part of the frons ; vertex not 

 conspicuously elevated, without any ocelli or ocellar triangle. Face light 

 grey, very broad in both sexes, and descending considerably beneath 

 the eyes so as to form broad but rather flat light grey jowls ; immedi- 

 ately beneath the antennae there is a fine cross furrow which rises up 

 at the sides and separates the cheeks from the frons, and from which 

 two similar furrows (usually much more narrower than the cross one) 

 descend and separate the very broad shelving light grey side-cheeks 

 from the epistoma, and these furrows end in darkened pits near the 

 mouth margin ; the upper part of the side-cheeks usually dotted with 

 small black spots, and pubescence on the face, cheeks, and jowls ail 

 long almost erect and pale coloured. Antennae porrect, longer than 

 the head, usually blackish ; basal joint more or less dilated especially 

 in the male considerably dilated, as long as or longer than the third 

 joint, and bearing long thin pubescence ; second joint short, cup-shaped, 

 and bearing a circlet of short black bristles ; third joint elongate, more 

 or less dilated near the base but not humped dorsally, and with its 

 basal annulation tapering to its tip, and with the other three annulations 

 about as wide as the tip of the first annulation and appearing to form 

 a stout blunt style ; this first annulation of the third joint is as long 

 as or longer than the other three together, and often appears to be 

 divided again into further sections, while the next two annulations are 

 almost transverse and the last one longer than either of the two pre- 

 vious ones ; third joint bare (unless microscopically) except for some 

 tiny black bristles which often occur in an incomplete (mainly dorsal 



