JUBININI 49 



First tergite equal or subequal in length to second tergite; if longer, 

 not more than one-fifth longer than second tergite 4 



2. Vertex with the median sulci vestigial, absent or just perceptible 



GROUP I. 



Vertex with two well-defined sulci 3 



3. Antennal club very distinct, clearly defined from rest of the antenna 



GROUP 11. 



Antennal club indistinct GROUP III. 



4. Vertex with the sulci narrow, and with the vertexal foveae so small 



that they are not obvious, and in consequence, the sulci appear to 



arise de novo from the vertex 5 



Vertex with the sulci and vertexal foveae well differentiated, the foveae 

 broader than the sulci, so that the latter are seen to leave the foveae 

 as a narrower channel 6 



5. Antennal club distinct, composed of the last four segments, e.g. seg- 



ments VIII, IX, X and XI GROUP IV. 



Antennal club indistinct GROUP V. 



6. Antennal club distinct, composed of the last five segments, e.g. seg- 



ments VII, VIII, IX, X and XI GROUP VI. 



Antennal club indistinct GROUP VII. 



Jubus terranus new species 



Head 0.328x0.335 mm.; pronotum 0.369x0.436 mm.; elytra 0.469x0.549 

 mm.; abdomen 0.657x0.643 mm.; total length 1.84 mm. 



General body color light yellowish brown. Pubescence straw color, closely 

 appressed; average length of body pubescence 0.0335 to 0.0536 mm. 



Head subtriangular, occiput strongly sinuate, broadly impressed at median 

 posterior margin, this depression forming a broad basal notch. Eyes medium in 

 size, composed of about 26 facets, not conspicuous. Vertexal foveae small, equi- 

 distant from the occipital margin and the anterior margin of antennal insertion 

 on the front; the foveae close together, each fovea being much closer to its com- 

 panion fovea than either is to its associated eye. A narrow sulcus proceeding 

 anteriorly from each vertexal fovea, this sulcus being about the same diameter 

 as the fovea, straight for the basal half of its length, then arcuate mesially to 

 unite with the companion sulcus to form a common sulcus which ends at the 

 center of the antennal tubercle. Front simple, almost vertical, greatly reduced 

 between the antennal insertions to form a thick lamina. Antennae close together 

 at base as typical for the genus, stout, eleven-segmented. Segment I very short 

 from above and subquadrate, because of the expansion of its apical articular 

 surface to the dorsal face; II not quite as wide as I, and from a certain point of 

 view shaped like a parallelogram; III to VII gradually increasing in width; 

 III obconic; IV to VII progressively more rhomboidal; VIII, IX, X and XI 

 forming the club, and conspicuous because of their length, the four of about the 

 same width; XI conical, truncate basally, subacute apically, the segment about 

 two and a half times longer than X. Maxillary palpi small, first segment minute; 



