872 CALIFORNIA ACADEMY OF SCIENCES. 



Thorax compressed at the sides, uniformly and gently 

 curved and slightly convex above. Suture between the 

 pro- and mesonotum obsolete, both segments forming one 

 piece which is slightly broadest in front; pronotum some- 

 what angulated posteriorly and prolonged in front into a 

 short neck. Meso-metanotal suture slight and most read- 

 ily observed if viewed from the front. Metanotum of 

 equal width, the declivity convex and bordered on each 

 side by a curved carina, which at its upper end forms a 

 minute and slightly projecting angle. Node very stout, 

 longer than broad, truncate in front and behind, broadest 

 and highest posteriorly, where it is as broad or somewhat 

 broader than the metathorax; it is longitudinally arcuate, 

 convex above and at the sides; on the anterior end of its 

 under side is a large, flattened and backward curved 

 tooth, the basal portion of which extends carina -like to 

 near the end of the segment. 



Abdomen longer than the thorax, anteriorly slightly 

 broader than the scale and strongly constricted between 

 the first and second segment. First segment with a tooth 

 below the insertion of the scale. 



Entire insect polished. Head, thorax, scale and the 

 two basal segments of the abdomen closely and longitu- 

 dinally striated above and at the sides, the striae some- 

 what finer on the second segment of the abdomen, the 

 remaining segments smooth and highly polished. Man- 

 dibles sparsely punctured. Erect hairs of the body, legs 

 and scape fine and quite profuse. 



Color red or yellowish -red, the abdomen somewhat 

 paler; the head and thorax with a red reflection and the 

 scale and two basal segments of the abdomen with a beau- 

 tiful golden reflection. Cutting edge of mandibles black 

 or dark brown; eyes black; scape and legs yellow. 



Many specimens. Tepic. 



