A. A. GIRAULT. 273 



DIAGNOSTIC TABLE 



of the North American species of Gonatocerus Nees — Males, Females. 



I. Ovipositor not exserted. Species yellowish to brown through brown- 

 ish-black to black. Fore wings variable, broad, moderate 

 or comparatively narrow and without a fascia. 



A. Fore wings very broad, with from forty-five to fifty longitudinal 



lines of discal cilia across their widest blade portion ; only 

 about twice longer than broad. 

 1. Marginal vein long ; posterior wing across distal end of vena- 

 tion distinctly broader than the length of the longest mar- 

 ginal cilia of fore wing ; dark brown , the wings hyaline ( male ) . 



latipennis Girault. 



B. Fore wings broad, with from twenty-five to thirty longitudinal lines 



of discal cilia across their widest portion ; only about two 

 and a half times longer than broad ; marginal cilia of fore 

 wing relatively short. 



1. Posterior wings at apex of venation broadened, twice broader 



than the blade just before apex or broader than the longest 

 marginal cilia of fore wing. 

 Marginal vein of fore wing very long, about twelve times longer 

 than wide ; proximal tarsal joint of caudal legs long"; dark 

 brown, legs dark ; robust, second and third funicle joints 

 distinctly longer than pedicel, each twice longer than wide. 



dolichocerus Ashmead. 



2. Posterior wings at apex of venation not distinctly broadened, 



narrower than, or only as wide as, the longest marginal cilir 

 of fore wing. 



Second and third funicle joints of antennae each twice longer 

 than wide, each subequal to, or longer than, the pedicel; 

 marginal vein of fore wing relatively shorter ; dark brown, 

 legs light yellow nij»Titarsis Ashmead. 



Second and third funicle joints of antennae each shorter, the 

 second only a half longer than wide, the third longer than 

 the fourth but distinctly shorter than the pedicel ; legs dark 

 brown luaxium.s Girault. 



Second and third funicle joints still shorter, the third shorter 

 than the fourth, the joints gradually enlarging distad, none 

 larger than the pedicel ; fore wings somewhat narrower, the 

 marginal vein shorter iiisevius Girault. 



C. Fore wings narrower, with only from about twenty to twenty-five 



longitudinal lines of discal cilia across the widest blade por- 

 tion and about thrice longer than broad ; marginal cilia 

 longer. Funicle joints 2 and 3 of antennae only about one 

 and a half times longer than broad, each distinctly shorter 

 than the pedicel ; posterior wing at apex of venation not 

 broadened but normal. 



TRANS. AM. ENT. SOC, XXXVII. (35) 



