NATHAN BANKS. 339 



lower genital plates of male meet on the median line (as in adnixa) , 

 but seen from the side they are more rounded outward and less sloping 

 than in that species ; the upper male appendages taper toward the tip. 

 The posterior sides of the head are less rounded than in R. ad?iixa. 

 Expanse 23-26 mm. 



From Pasadena, 31 May, 29 June ; San Gabriel Mountains, 

 17 June, Mt. Wilson, 5 June, all from Southern California 

 (Grinnell). 



Our species of Raphidia can be tabulated as follows : 



1. Besides the usual three white dots on veins of fore wings there is a 



fourth situate on middle of posterior side of the second cell 

 below stigma ; bristles of veins very short ; only three cells 



under stigma 2. 



Only the usual three white dots on veins; bristles of veins plainly 

 visible 3. 



2. Stigma reaching one-half beyond the cell below it distiiicta. 



Stigma not reaching beyond the cell below it Iiiiiillta. 



3. Basal joint of antennae as pale yellow as the second joint 4. 



Basal joint of antennae dark 6. 



4. Five cells under stigma ; large species ; last ventral of female 



slightly prolonged ; stigma very long assiiiiilis. 



Four cells under stigma, small species 5. 



5. Head pale in front of antennae ; superior male appendage truncate. 



adnixa. 



Head barely paler in front ; superior male appendage sloping to the 



tip ; astuta. 



6. With but three cells under stigma, which is very short, often more 



or less bicolored bicolor. 



With four cells under stigma, which is longer, unicolorous (some- 

 times the number of cells is five or rarely three) 7. 



7. Anterior third or fourth of pronotum pale ; upper male appendage 



with apical point below arizoiiica. 



Anterior half of pronotum pale ; upper male appendage without 

 point below 8. 



8. Head narrower behind ; upper male appendage quadrangular, lower 



plates meet on median line occulta. 



Head broader behind ; upper male appendage triangular ; lower 

 plates are bent out in the middle exposing a cavity. ..oblita. 



CHRYSOPID^. 

 Clirysopa canadensis n. sp. 



Yellowish ; a black mark on each cheek, a vertical mark between 

 the antenna, divided above ; palpi marked with black ; second joint 

 of antennae black; pronotum broader, sides subparallel, with four 



TRANS. AM. ENT. SOC. , XXXVII. 



