4()() j'iio' i:i:/}fX(^s of the national museum. 



by a slisfht notch and sometimes with a slight notch lateral to each; 

 the ivflcxed margin with a tendency to ferruginous; pul)escence con- 

 tinued upward from the clypeus over the frons to above the antenna^, 

 sometimes nearly to the ocelli, mixed with golden hairs averaging a 

 little shorter than on the clypeus; frons and vertex with scattered, 

 minute jiunctures; occiput minutely punctured, bearing dark and yel- 

 low hairs about as long as those on the fi'ons; a transverse- oval area 

 just behind the ocelli is rather velvety black; cheeks nearly as wide as 

 the eyes, with a golden pubescent band close behind tiie eyes, not 

 reaching their tops, and variable in width and amount; with very long 

 yellow hairs, most abundant low down; inner margins of the e^^es 

 parallel; scape of the antenna^ ferruginous, either entirely or with 

 more or less black above, with short yellowish hairs, particularly on 

 the inner side; pedicel short, black, sonn^times sligiitiy ferruginous 

 ])eneath; tilament black, its first segment much the longest; mandibles 

 large, stout, two-toothed, the teeth l)lack to their bases, the remainder 

 of the mandil)le ferruginous, with a few long light-colored hairs on 

 the inner margin, pointing toward the anterior tooth; outer margin 

 with scattered light-colored hairs; anterior face with a few elongated 

 indentations on the ferruginous portion. 



Tliorax. — Anterior face of the collar rising nearly at right angles to 

 the neck, rather flattened from side to side, golden pubescent, least so 

 in the middle; dorsal edge evenly rounded from side to side, golden 

 pubescent, the edge and the anterior face bearing long, golden hairs; 

 posterior face not closely appressed against the mesonotum; side in 

 front of the prothoi'acic lobe black, glistening, though with many 

 hairs; the prothoracic lobe black in front, golden pubescent behind, 

 and bearing long, golden hairs; mesonotum black, with a band of 

 golden pubescence on each side extending from the prothoracic lobe 

 upward, then backward, then inward on the posterior margin of the 

 plate, where it is narrower, till it meets the band from the opposite 

 side; lateral margins of the plate slightly reflexed; remainder of the 

 plate black, coarsely, closely punctured, and with many short, yellow 

 hairs; with a slight anterior median groove extending about one-third 

 of the length of the plate; the surface of the plate is sometimes so 

 thickly covered with hairs as to partly conceal the pubescent bands 

 and give the whole area a dull brownish yellow appearance; scutellum 

 black, somewhat arched, with a median longitudinal groove, more 

 marked behind, tinel}', sparsel}^ punctured and almost devoid of hairs, 

 except when the insect is unusually hairy ; postscutellum with a median 

 longitudinal groove; golden pubescent as far laterally as the lateral 

 suture of the dorsum of the median segment; median segment black, 

 covered above and behind with golden pubescence, not generally so 

 dense above as to conceal the surface, which is minutely, transverseh' 

 aciculate; from the fovea to the petiole the pubescence is very thick. 



