196 Natural Histor.y Bulletin. 



upper surface has a rather vague median groove, the remain- 

 ing points of sculpture corresponding tolerabh' well to the 

 description given of a Diccehis larva by Dr. Horn in the 

 Trans. Arner. Ento. Soc, VIL, p. 37, though the lines are 

 well impressed. The triangular impression on the under sur- 

 face of the head is well defined and extends quite to the basal 

 margin. 



Eyes consist of six ocelli, around a raised dark spot imme- 

 diately behind the insertion of the antennee. 



Antennas four-jointed, inserted immediately behind the man- 

 dibles, first joint shorter and stouter than the others, glabrous, 

 second more than twice as long, also glabrous except for a 

 few hairs near the tip, third a trifle longer, fourth a little more 

 slender and also longer; the last two joints are pubescent. 



Mandibles rather long, arcuate, with a strong tooth at base 

 and with minute serrations internally. 



Maxillae with slout basal piece and two terminal appendages, 

 the outer the larger and having the basal joint as broad as 

 long, bearing stout bristles; second joint more slender, about 

 twice as long as broad, slightly bristled; third joint still more 

 slender and tipped with a tubercle, probably really a fourth 

 joint. Inner piece two-jointed, proportioned as in figure. Just 

 posterior to this is a third appendage, ver}' small, two-jointed 

 (the second joint being very minute), the first joint bearing 

 a stout bristle. 



Mentum broader than long, bearing short two-jointed palpi, 

 the joints nearly' equal, the second oval. 



Prothorax longer than wide, narrowed in front, angulate 

 behind the middle, and with a longitudinal well impressed me- 

 dian line for the entire length, on each side of which is a feeble 

 oblique impression. Except for one or two long bristles near 

 the posterior angles it is naked. 



Mesothorax shorter and broader than the prothorax but 

 with about the same sculpture, metathora?: still broader. 



Abdomen. First segment shorter tiian the others, second to 

 eighth subequal. The dorsal surface of each bears a scute sim- 



