Hynioioptera Ori en talis. 123 



rablc to this species. The antennae bear a short white pile, 

 and have the third joint less than one-fourth longer than the 

 fourth. The cheeks, eye incision, and clypeus are densely 

 covered with silvery pubescence ; the front and vertex are 

 shining, minutely punctured ; and there is in the latter a 

 large depression, rounded behind, triangular in front, with a 

 distinct raised margin ; from the middle (at the angle) a 

 short keel runs to the eye incision ; and from the apex a 

 stout keel runs to the antennae. At the top the eyes are 

 separated by the length nearly of the second and third 

 joints united. The two hinder ocelli are placed in round 

 depressions, and are separated by a margin ; the front 

 ocellus is placed in the large frontal area. The meta- 

 notum is strongly transversely striolated ; at the base in 

 the centre there is a wide furrow, twice longer than broad, 

 surrounded by a broad margin ; and on either side of this 

 is a broad furrow which unites into a broad furrow running 

 down the centre to the apex. The metapleurse are much 

 more finely and closely striolated. The mesonotum is 

 finely punctured, and is of almost an olive hue. The 

 abdomen is more than twice the length of the head and 

 thorax united. The petiole is nearly twice the length of 

 the second joint. The calcaria are pale. 



The peculiar shield-shaped depression separates this 

 species readily from the others. 



Trypoxylon intrudens. 

 Smith has named doubtfully some specimens in Mr. 

 Rothney's collection as this species. They have the head 

 rather strongly punctured ; the front furrowed in the centre; 

 the eyes at the top separated by the length of the third 

 antennal joint ; there is a wide furrow in the centre of the 

 metanotum, with a curved narrower furrow on either side of 

 it, meeting at the central apical furrow. The furrows trans- 

 versely striolated ; the rest of the metanotum finely punc- 



