422 



JOURNAL OF ECOXO^IIC ENTOMOLOGY 



IVol. 8 



tubercles which are large and shghtly gibbous. The basal joint is also sUghtly gibbous. 

 The antennae are pale green in color with the articulations of joints III and IV, apical 

 thu'd of V, apical half of VI, and filament, blackish. Sensoria of joint III number 13 

 to 17. They are on basal thii'd, are transverse oval, elongate, and not placed so closety 

 together as in E. hetulce Kalt. Filament of VI about thi-ee-quarters as long as the 

 joint. Eyes red. OceUi rather large. Thoracic lobes and scuteUum hght greenish- 

 bro\\Ti. Wings rather narrow; stigma long and narrow; stigmatic vein deeply 

 curved; veins not as dark as in hetulce. Legs pale green; knees, tarsi and tibial apices 

 black or dusky. Anterior margin of femora mth a row of brownish spots, often coa- 



MHA.STJREMENTS 



Length Width 

 of body of body 



Wing 

 expanse 



Hmd 

 tibia 



Beak 



Cor- 

 nicles 



Cauda 



I. Stem-mother; Wahiut Creek, Cal. 

 Alnus rhomUfolia, March 23, 

 1915. 



2.50 



.74 





2.55 

 2.52 



.53 



.106 

 .106 



.22 





2. Stem-mother; Wakiut Creek, Cal. 

 Alnus rhomUfolia, March 23, 

 1915. 



2.51 





9.24 





.60 



.141 

 .140 







3. Second generation; Wabut Creek, 

 Cal. Alnus rhomUfolia, April 

 24, 1913. 



2.45 



.83 



8.70 



2.79 



.62 



.140 

 .131 



.22 





4. Second generation; Walnut Creek, 

 Cal. Alnus rhomUfolia, April 

 24, 1913. 



















5. Second (?) generation; San Jos6, 

 Cal. Alnus rhomUfolia, May 

 5, 1912. 



3.64 



.93 



9.61 



3.26 

 3.46 



.68 



.136 

 .136 



.22 





6. Generation (?); Colorado. Betula 

 fontinalis, August 1, 1909 

 (CP Gil'ette). 







9.33 



3.01 

 3.05 



.67 



.157 

 .136 



.21 





Anthem 





I 



II 



m 



IV 



V 



VI 



Fila- 

 ment 



Sensoria 

 (HI) 



1. 



.19 

 .18 



.09 

 .09 



1.37 

 1.34 



.76 

 .73 



.66 

 .63 



.30 

 .30 



.17 



.18 



16 - 

 15 



3. 



.25 

 .25 



.11 

 .11 



1.71 

 1.74 



.96 

 .98 



.80 



.84 



.34 



.22 



15 

 15 



4. 







1.72 

 1.67 



.96 

 .97 



.84 

 .87 



.34 

 .34 



.20 

 .20 



14 

 15 



5. 



.24 

 .26 



.105 

 .105 



1.74 

 1.71 



1.27 

 1.27 



1.03 

 1.01 



.41 

 .43 



.31 

 .30 



16 

 13 



6. 



.23 

 .24 



.11 

 .11 



1.71 

 1.71 



1.16 

 1.16 



.97 



.99 



•41 . 

 .41 



.30 

 .31 



17 

 16 



