Plate XIII 



Fig. 1. Trimiomelba dubia (LeContel. Right eye, male, 40 to 45 facets, ant., 

 anterior; ven., ventral. Slide mount, 700 diameters. 



Fig. 2. Eupsenius glaber LeConte. Head, antennae and pronotum from dorsal 

 face. 



Fig. 3. Trimiomelba dubia (LeConte). Toadstool-shaped vertexal spine on 

 the head of male. Pubescence not shown. Note coarse, shallow 

 integumental punctures around pedicel of spine. Slide mount, 700 

 diameters. 



Fig. 4. Sonoma (Rafonus) tolulae (LeConte). Ventral aspect of prothorax. 

 PS, prosternum; PCC, prothoracic coxal cavities; APF, anterior 

 prosternal foveae; LPF, lateral prosternal foveae; MPF, median 

 prosternal fovea (unpaired). This is a generalized, primitive pros- 

 ternal field with five out of a theoretical six foveae. 



Fig. 5. Sonoma (Rafonus) tolulae (LeConte). Right elytron, male. This is a 

 primitive elytron with a row of foveae on the flange fitting under 

 the pronotum, and ten rows of punctures on the integument. The 

 small foveae near the sutural margin may vary from 2 to 5 in 

 number, the first basal fovea may be present or absent, the second 

 row of discal foveae is more constant. 



Fig. 6. Euplectus (Pycnoplectus) interruptus LeConte. Ventral aspect of 

 prothorax, female. PS, prosternum; PCC, prothoracic coxal cavi- 

 ties; LPF, pubescent lateral prosternal foveae. 



Fig. 7. Sonoma (Rafonus) tolulae (LeConte). Lateral aspect of abdomen, 

 male. MCA, metathoracic coxal acetabulum in first sternite. Seven 

 sternites shown (Sl-71 and six tergites shown (Tl-6), however in 

 dry mounts only five tergites are visible. 



Fig. 8. Euplectus (Pycnoplectus) interruptus LeConte. Right elytron, female. 

 Note four large foveae, one sutural and three discal. The subhumeral 

 fovea does not show from this view, but is indicated in Fig. 8a, a 

 lateral view of the elytron. Note that the subhumeral fovea is 

 pubescent and almost surrounded by a cariniform line. 



Fig. 9. Sonoma (Rafonus) tolulae (LeConte). Ventral aspect of abdomen, 

 male. MCA, metathoracic coxal acetabulum on each side the first 

 visible sternite. Seven visible sternites (Sl-7). Note that the seventh 

 is composed of three asymmetrical pieces, a right and left lateral 

 and a median, pygidial plate. 



