Vol.1] ya,i Duzcc.—Lale Tahoe Hemiptera 243 



differing in the shorter pronotum, more prominent caUosities, 

 larger basal joint of the rostrum and the stonter second segment 

 of the antennae. 



Microphylellus hicinctus Van D. Taken on the chaparral 

 along the western shore of Fallen Leaf Lake early in July. 

 Apparently rare. 



Gerhardiella delicata Uhler. Two examples were beaten from 

 the chinquapin oaks along the western shore of Fallen Leaf Lake 

 late in July. There seem to be no good structural characters by 

 wiiich to distinguish between this genus and certain related 

 genera such as Psallus. Apocremnus and Plagiognailnis. By 

 separating out the forms having the femora dotted in longi- 

 tudinal series and the tibiae dotted with black we have a fairly 

 homogeneous group including the types of the genera Plagiog- 

 nathus and GerJiardicJIa, and I can see no harm in using the 

 latter name for the red forms, as they have quite a different 

 aspect from the more typical forms of Plagiognaihus. If we do 

 this, it would seem advisable to divide genus Psallus, placing 

 those forms with ovate blackish bodies and dotted tibiae in genus 

 Apocremnus. It is possible that further study may disclose good 

 structural characters for distingi;ishing these genera, but I have 

 not yet detected any that seem at all constant. 



Apocrem)ius politus Uhler. Taken about the upper end of 

 Fallen Leaf Lake and at Half ^loon Lake in July. This species 

 is smaller and more slender than the more typical auchorifer 

 Fieb., but for the present I prefer to place it here rather than 

 in Plagiognathus, as it has the black femora and the white scale- 

 like vestiture of Apocremnus. In this species the second antennal 

 joint is entirely black. 



Apocremnus nigerrimus, new species 



Larger than politus, deep black, polished, clothed with coarse deciduous 

 white hairs; apical joint of antennae concolorous, tibiae obscurely dotted. 

 Length 3.5 mm. to tip of membrane. 



Head about as in auchorifer, viewed from the side shorter, with the 

 facial angle more acute; projecting below the eye for a distance equal 

 to the greatest width of the eye. Vertex ecarinate, a little flattened. 

 Antennae hardly shorter than in auchorifer ; first joint surpassing clypeus 

 by about one-third its length; second as long as pronotum and one-half 

 the head; third and fourth together as long as second. Pronotum rather 



