234 University of California Publications. [Extomologt 



Described from two males taken about the upper end of Fallen 

 Leaf Lake, July 12. This species is very distinct from any other 

 known to me by its subacute humeral angles and the concave 

 latero-anterior margins of the pronotum. The short rostrum 

 allies it with Quilnvs and in some respects it is intermediate 

 between that subgenus and the more typical aradids. 



Aradus falleni Stal. One specimen taken from a fallen pine 

 tree near Cathedral Lake on the eastern slopes of jNIount Tallac, 

 July 5. 



Mezira moesta Stal. A single individual of this common form 

 was taken near the upper end of Fallen Leaf Lake on July 2. 



Lijgaeus recUvatus Say. Found in numbers on a patch of 

 milkweed near the sawmill at the lower end of Fallen Leaf Lake, 

 July 25. 



Lygaeus truculcntus Stal. A few taken on Howers near the 

 lower end of Fallen Leaf Lake in July. 



Lygaeus hicrucis Say. Taken at Grass Lake and near Fallen 

 Leaf Lake in late June and early July. 



Xysius calif or nicus Stal. Common at lower levels but also 

 found at Half ]\Ioon Lake and up to 8500 feet on Mount Tallac. 



Nysius ericae Schill. Half ]\Ioon Lake, July 23. 



Nysius ericae mi nut us Uhler. A few taken near Tallac in 

 July. 



IsclinorrhyncJius resedae Panz. One specimen was beaten 

 from chaparral along the trail on the west shore of Fallen Leaf 

 Lake. July 5. 



Geocoris pallens decoratus Uhler. One example taken on the 

 low lands near Tallac on July 25. 



Ligyrocoris diffusus Uhler. With the preceding. 



Sphragisticus itehulosus Fall. Swept from grass near the 

 lower end of Fallen Leaf Lake, July 17. 



Rhyparochromus a)igustatus Van D. This form may be 

 roughly distinguished from sodalicus Uhl. by its having the third 

 antennal joint entirely black, the lateral edges of the pronotum 

 concolorous and the clavus ferruginous at base. It is a long 

 narrow form and northern in its distribution. Here it was found 

 near Tallac in July. 



Scolopostethus thmnsoni Rent. Three examples were taken at 

 Tallac and about the upper end of Fallen Leaf Lake in July. 



Ploiariodes sp. One example taken at the Lodge in July. 



