HYMENOPTEKA. 469 



7. Ptilia nigerrima, (Tab. XX. fig. 19.) 



Ptilia nigerrima, Camer. Trans. Ent. Soc. Lond. 1884, p. 485 \ 

 Hah. Mexico, Northern Sonora {Morrison l ). 



ANDEICUS (to follow the genus Synergus, p. 72). 



Andricus, Hartig, in Germans Zeitschr. f. Ent. ii. p. 185 (1840). 

 Aphilothrix, Forster, Verh. zool.-bot. Ges. Wien, xix. pp. 331, 336 (1869). 



This is a dimorphic genus, Andricus being the spring bisexual and Aphilothrix the 

 autumnal agamic (unisexual) form. 



1. Andricus (Aphilothrix) aztecus. (Tab. XX. fig. 23.) 



Andricus {Aphilothrix) aztecus, Camer. Ann. & Mag. Nat. Hist. (6) xix. p. 261 (1897) \ 

 Hah. Mexico, Northern Sonora {Morrison 1 ). 



AULAX (to follow the genus Andricus). 



Ay lax, Hartig, in Germans Zeitschr. f. Ent. ii. p. 186 (1840). 

 Aulax, Dalla Torre, Cat. Hymen, ii. p. 119 (1893). 



1. Aulax rufipes. (Tab. XX. fig. 21.) 



Aulax rufipes, Camer. Trans. Ent. Soc. Lond. 1884, p. 485 \ 

 Hah. Mexico {BilimeJc, in Mus. Vind. Cms. l ). 



EUCCELA (to precede the genus Cothonaspis, p. 73). 



Eucoila, Westwood, Mag. Nat. Hist. vi. p. 494 (1833). 

 Euccela, Dalla Torre, Cat. Hymen, ii. p. 15 (1893). 



1. Euccela claripennis*. 



Eucoila claripennis, Camer. Mem. & Proc. Manch. Lit. and Phil. Soc. ii. p. 14 (1889) \ 

 Hah. Mexico, Vera Cruz {H. H. Smith x ). 



2. Eucoela mexicana*. 



Eucoila mexicana, Camer. Mem. & Proc. Manch. Lit. and Phil. Soc. ii. p. j 14 (1889) \ 

 Hah. Mexico, Orizaba {F. D. G. and H H. Smith *). 



3. Euccela marginicollis *. 



Eucoila marginicollis, Camer. Mem. & Proc. Manch. Lit. and Phil. Soc. ii. p. 15 (1889) \ 

 Hah. Mexico, Orizaba {F. D. G. and H. H. Smith x ). 



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