OF WASHINGTON. 243 



angle with the first, third furcal very little shorter than the fourth which 

 runs into the tip of the wing; second marginal cell higher and larger; 

 marginal veinlets distinct. 



(5\ Genital segment pale yellow, sometimes infuscated at base, plate 

 much larger than the segment, more broadly oval than in the preceding, 

 with the tip more acuminate and usually blackish ; forceps much lower 

 than the plate, narrow, simple, gently curved forward, tip subacute. 



9- Genital segment pale yellow, brownish toward tip, as long as the 

 three preceding ventral segments together; upper plate gradually drawn 

 out into a very acute but not very long point, upper edge straight, gradu 

 ally sloping toward the tip ; lower plate somewhat shorter and less acute 

 at tip than the upper one, lower edge straight. 



Numerous specimens collected by Mr. Koebele in Los Angeles 

 Co., Cal., on Rhus integrifolia in the month of March. I 

 have also seen several immature specimens from the same local 

 ity collected by Mr. D. W. Coquillett. 



Type. No. 8147, U. S. National Museum. 

 Calophya flavida, n. sp. 



Average length 2 mm. Color uniformly honey-yellow, legs and an 

 tennae paler, thorax sometimes with ill-defined markings of a pale brown 

 color and of the usual pattern. Head and thorax smooth, shining, ver 

 tex a little longer than in the following species, discal impressions vari 

 able in size, sometimes punctiform, sometimes foveiform and occupying 

 nearly the whole width of the vertex; frontal processes distinctly cone- 

 shaped, a little longer than wide at base, diverging toward the tip which 

 is moderately acute; antennae distinctly shorter than the width of the 

 head, stout, indistinctly darker at tip. 



Wings more elongate than in the preceding species, 2^ times longer than 

 wide, widest beyond the middle, regularly rounded at tip, pale yellow, but 

 little shining, tolerably transparent, absolutely punctulate; veins promi 

 nent, cubitus fully 3 times shorter than discoidal part of subcosta ; 

 stigma narrow but distinct and as long as anterior basal cell, radius 

 straight; stem of second fork less curved than in the preceding; first fur 

 cal but slightly shorter than the stem, slightly curved, terminating rec 

 tangularly upon the costa; second furcal about 2^ times longer than the 

 fourth, forming an oblique angle with the first, at basal third straight and 

 not running toward the stem of second fork, at middle decidedly but not 

 abruptly curved and terminating obliquely upon the costa; third furcal 

 but little shorter than the fourth which is about equal in length to the 

 first and runs in the tip of the wing; cubital cell much less narrowed at 

 middle than in the preceding; first marginal cell triangular rather than 

 quadrangular, but little higher than wide and about twice larger than 

 second marginal cell; marginal veinlets rather obsolete. 



(J 1 . Genital plate longer but not much larger than the genital segment, 

 oblong-oval in shape, narrower than in the preceding species; forceps 



