32 PACHYTERIA RUGOSICOLLIS. 



on the outside of the mandibles and on the space between 

 the eyes and the mandibles is much finer; the front sur- 

 face of the mandibles is smooth, impunctate. The longi- 

 tudinal groove between the antennary tubers, which are 

 slightly pubescent , is continued down to the anterior margin 

 of the clypeus, and crossed by a transverse groove be- 

 tween the lower lobes of the eyes. The scape of the an- 

 tennae, which are stouter and comparatively shorter in 

 the female than in the male , is finely rugose in conse- 

 quence of a dense punctuation ; the third joint is about 

 as long as the two following joints taken together. 



The prothorax distinctly longer than broad at the base, 

 armed on the middle of the sides with a short tooth-like 

 angle; the anterior and especially the posterior margin 

 strongly upturned; the upper surface transversely rugose, 

 the intervals provided with large punctures. The scutellum 

 elongate-triangular, sub-acute at the apex and covered 

 with a black velvety pubescence. 



The elytra gTadually narrowing from the base, their 

 apices slightly emarginate ; the luteous coloured basal half 

 and the green streak along the suture on the apical half 

 strongly and rather closely punctured ; the remaining blue 

 portion of the apical half finely and most closely punctu- 

 red, and moreover covered with a black velvety pubes- 

 cence. 



The under surface of the thorax covered with a silvery 

 pile, except on the sides of the metasternum, where it 

 has a black color; the under surface of the abdomen na- 

 ked, with the exception of transverse lateral patches of a 

 very dense silvery pubescence on the apical half of the 

 segments. The metasternum is provided with a longitudi- 

 nal impressed line , and as well as the abdomen , sparingly 

 covered with punctures of different size. The apical margin 

 of the fifth ventral segment is bisinuated in the female, 

 broadly emarginated in the male ;j in the latter sex the 

 apical (6th) ventral segment shows a horseshoe-shaped emar- 

 gination , v/hereas the apical dorsal segment is narrowly 



JSotes from the Leyden ^luseum, "Vol. III. 



