BY E. W. FERf^USON. 239 



Mackamyctkrus insignis, n.sp. or \ai-. 

 (Plate xiv., figs. 3, 4.) 



Size large, elongate, robust; t'einale })y far the larger and moi'e 

 robust insect. Protliorax widely explauate, median tubercles vari- 

 able in num})er, elytra strongly tu))erculate. Black, tubercles nitid, 

 with sparse greyish clothing, generally abraded, sides maculate 

 with white. 



(J. Head broad, forehead deeply concave, bounded by a pro- 

 longation ))ackwards ol' the external rostral ridges, middle of cavity 

 rather strongly raised, subcai inate; internal rostral ridges not pro- 

 minent, rounded in appearance, short, strongly convergent, median 

 area depressed, apex of rostrum widely but not deeply emargi- 

 nate. Scrobes not definitely limited behind; undersurface of exter- 

 nal ridges thickened in middle. Eyes subovate, deeply set. Pro- 

 thorax (6x9 mm.) widely explanate-tuberculate at sides, sud- 

 denly constricted before base, tubercles seven in number on left, 

 five on right, flattened above, projecting laterally, graduated in 

 size to middle, ai:)ical margin with a single row of small tubercles, 

 a similar but smaller row along posterior margin ; an irregular row 

 of tu])ercles on either side of median area, tubercles irregular in 

 size, mainly transverse, not greatly elevated, ten in number on 

 each side in type; median and sublateral areas smooth, save for 

 some obsolete scarring, a few granules at base of median area. 

 Sides with small granules, with a few, larger, flattened tubercles 

 beneath lateral edge. Elytra(16 x 8 mm.) elongate, little dilatate, 

 apex strongly rounded, with a flange of small tubercles, absent in 

 centre; base subtruncate, humeral angle with a small tubercle ]>ro- 

 jecting laterally. Disc with lines of minute punctures, subtended 

 l)y small set.-e, hardly traceable into striae, only clearly seen where 

 tubercles are deficient; with rows of strong tubercles, suture with 

 a row of fine granules, first row with five or six tubercles, not 

 extending to base, last two on declivity, conical; second row with 

 six or seven from base to edge of declivity, the last one conical; a 

 single tubercle corresponding to fourth interstice; third row with 

 conical tu])ercles commencing from the middle, and extending 

 down declivitv; fourth with six strong tubercles from humei-al 



