CHRYSOPA. 221 



31. Ch. harrisii. 



Chrysopa harrisii Fitch, Report I, W. Chrysopa perla Harris, Ins. New 

 England, 215. 



Very much like Ch. novaeboracensis, but a little broader ; the 

 veins all green. (From the description of Dr. Fitch.) 



Length to tip of wings 15 millira. Alar expanse 28 millim. 

 Nab. New York, in July and August (Asa Fitch). 



32. Ch. external 



Chrysopa externa HagenI 



Greenish-yellow; thorax and abdomen with a middle, yellow 

 vitta ; the mouth anteriorly and the sides sanguineous ; antennas 

 fulvous, yellowish at base ; wings narrow, acuminate, fimbriated 

 with green ; all the veins green ; the divisory-veinlet of the third 

 cubital areole not reaching the first transverse veinlet of the first 

 radial sector. 



Length to tip of wings 14 millim. Alar expanse 26 millim. 



Hab. Washington (Osten Sacken); Mexico; California. 



May not this be Ch. harrisii? the wings, however, are narrower. 

 The species has the divisory veinlet not reaching the first trans- 

 verse veinlet, or rather not clearly exceeding it; and it is very much 

 like Ch. vulgaris, of Europe ; but differs by the wings being nar- 

 rower, and more acuminate. Ch. acuta, of the Berlin Museum, 

 is perhaps this species (from Brazil, Surinam, Mexico) ; but it 

 differs in having fewer gradate veins. 



33. Ch. robertsonii. 



Chrysopa robertsonii Fitch, Report I, 88. 



Pale green, with a pale dorsal stripe; head sulphureous, a short, 

 black line each side at the eyes ; antennas yellowish, the basal ar- 

 ticle whitish ; wings rounded at the apex, pterostigma green, veins 

 all green. (From the description of Dr. Fitch.) 



Length to tip of wings 15 millim. Alar expanse 26 millim. 



Hab. Tullehassie, Creek Indian Territory (Robertson). 



34. Ch. plorabunda. 



Chrysopa plorabunda Fitch, Report I, 88. 



Pale green, with a yellow dorsal stripe ; head yellow, with a 

 small black line at the eyes ; antennas whitish, with the apex yel- 



