KURYTOMTD-E. 91 



The two following species are described by Ratzeburg, in addition 

 to those before mentioned : — E. microneura, E. brunneiventris. 



Some of the European species of Eurytoma may be arranged in the 

 following groups : — 



Male. Antennae setaceous, nodose, verticillate-pilose, as long as 

 the thorax. 



Group 1. — plumata, Serratulae, curta, Abrotani, apicalis, collaris, 

 annulipes, atra s nodularis. 



Antennas longer and more slender than those of the first group, 

 longipennis. 



Antennas shorter and more compact than those of the first group, 

 platyptera. 



Antennae less dilated than those of the three preceding groups, 

 more compact than those of the first group, tumida, rufipes, Scul- 

 tenna, brevicollis. 



Antennae of the female : — 



Group 1. — plumata, Serratulae, curta> annulipes , rufipes, aethiops, 

 nodularis. 



Group 2. — tumida, Abrotani. 

 Group 3. — collaris. 

 Group 4.— atra. 

 Group 5. — platyptera. 



Variations of the wing-veins :— 



Group 1. — Ulna about one-fifth of the length of the humerus; 

 radius longer than the ulna, plumata, Serratulae, rufipes. 



Group 2. — Ulna about one-fourth of the length of the humerus ; 

 radius a little shorter than the ulna. Argele, fumipennis, tumida, 

 platyptera, gracilis, brevicollis. 



Group 3. — Ulna nearly one-third of the length of the humerus : 

 radius as long as the ulna, longipennis. 



Group 4. — Ulna about one-third of the length of the humerus ; 

 radius as long as the ulna. atra. 



Group 5. — Ulna about one-third of the length of the humerus ; 

 radius a little shorter than the ulna, curta, Abrotani, apicalis, 

 collaris, Scultenna, annulipes, Micipsa, aethiops. 



With regard to the North-American Eurytomae, E. Hecale, 

 Abatos, Cretheis, Iphis, Pythes and Teredon agree with E. longi- 

 pennis in the form of the prothorax. Tho form of the metathorax in 

 all these species, except the first, is like that of the preceding first 

 group of the European species; in E. Hecale its longitudinal sutures 



