88 THE CANADIAN ENTOMOLOGIST. 



fusion of R4+5 with Mj^.^, and the decided tendency of C1I2 to fuse with 

 I St A. 



The West Indian species {manca zwà. pallida Will., Dipt. St. Vincent, 

 p. 291-293, figs. 6, 7, q{ pallida) and possibly J/, albitarsia Dol. (E. Ind.), 

 also, which I have not seen, are the most gc^neralized members of the 

 genus, in that Cu^ and ist A are distinct to the wing-margin. The inter- 

 mediate group, containing trentepohlii Wied. (see Wiedemann, Aussereur. 

 Zweifl. Insekt., I, 551; 18, tab. VIb, fig. 12 ; a better figure in De Meijere, 

 Tijd. voor Ent., 19 11, pi. IV, fig. 42), fragillima Westw. (see Westwood, 

 Trans. Ent. Soc. Lond., 1881, pi. 17, fig. i ; also Needham, 23rd Rept., 

 N. Y. St. Ent., pi. 2r, fig. 6), and exornata Berg. (Bergr., Entomol. 

 Tidskrift, 1888, opp. p. 130, fig. 3), has Cu., fused with ist A for a short 

 distance back from the tip (C11.2+ ist A less than one-half Cu.,). A third 

 stage in the specialization of this part occurs in M. petinijes O. S. (E. Ind). 

 (See De Meijere, I.e., pi. IV, fig. 39.) The maximum of specialization, 

 as far as I know, occurs in the present species, where the fusion of CU2 

 with ist A is notable, and suggests the condition obtained in the families 

 Empididœ and Dolichopodidœ. 



Of the three described African species, M. zambesice, comes closest, 

 apparently, to exornata, M. fragillima (and probably M. airtipennis 

 also, according to Speiser, who compares it \\'\\.\\ fragillima), has vein Mo 

 separating from Cu^, and continuing distinct to the wing-margin ; both of 

 tiiese species possess a curious spur-like structure at the base of the fore 

 femora, which does not occur in M. zambesiœ. 



I have a (^ of M. exornata Bergr., taken at Queliniani, Zambesi R.. 

 Dec. 20, '08, in which the fore legs are lacking, and I am unable to state 

 whether or not this structure occurs there. M. exornata has been 

 recorded from Delagoa Bay, Portuguese East Africa ; Caffraria, E. Cape 

 Colony, and Amani, German E. Africa. It is apparently widely dis- 

 tributed throughout Eastern Africa. 



ON THE OCCURRENCE OF A EUROPEAN SPECIES OF 

 JMYMARID^ IN NORrH AMERICA. 



BY A. ARSENE GIRAULT, BRISBANE, AUSTRALIA. 



Up to the present I have been successful in finding but a single 

 species of the family Mymaridae, common to Europe and North America. 

 This species is Anaphes pratensis Foerster, which I have captured in 

 Illinois, and of whose characteristics I write of in a paper on Chalcidoidea, 

 to be published soon in Germany ; the species is recorded from America 



March, 1912 



