OF WASHINGTON, VOLUME XIV. 1912. 221 



of the two hosts, in this case the tse-tse flies and the verte- 

 brates, and a sufficient abundance of both. That the associa- 

 tion between the hosts of trypanosomiasis is not a close one 

 is compensated for by the long period during which the para- 

 sites are present in the circulation of the vetebrate host and 

 by the great abundance of these hosts. Furthermore, there 

 is reason to believe that when the habits of the different 

 species of Glossina have been carefully studied, specialization 

 of habits along the lines indicated will be found to exist in 

 the species concerned in disease transmission. 



A SYNONYMIC NOTE ON THE MYMARID^. 



BY A. A. GIRAULT. 



Parvulinus Mercet equals Alaptus Haliday. 



In the Boletin de la Real Sociedad espailola de Historia 

 Natural, Madrid, June, 1912, pp. 332-335, figs. 1-3, 

 Ricardo Garcia Mercet describes the genus Parvulinus as 

 new to the family Mymaridse for the species P. auranti Mercet. 

 Unfortunately, the author has been mistaken, for a perusal 

 of the description shows that Alaptus Haliday has been re- 

 described. The species auranti is thus an Alaptus, and knowing 

 the wide distribution of members of this genus it would not 

 be surprising if it should turn out to be one of the common Eu- 

 ropean species of that genus, for instance, minimus of Walker. 

 Thus, the species must be considered at best but doubtfully 

 valid. The figures given of the antenna and wrings certainly 

 resemble those appendages in what I have identified as the 

 species minimus. 



Mercet also probably falls into error concerning the host 

 of his Alaptus, since the members of this genus are usually 

 parasitic upon psocid eggs, while Mercet states them to be 

 parasitic upon coccids, merely from the fact that, if I have 

 rightly understood, they \vere reared from twigs infested by 

 coccids. Now, psocid eggs often occur among colonies of 

 coccids. 



In this connection I must again state that the genera of 

 the Mymaridae are few. 



A SYNONYMIC NOTE ON THE TRICHOGRAMMATID^E. 



4 



BY A. A. GIRAULT. 



Jassidophthora Perkins equals Brachistella Girault. 

 R. C. L. Perkins, in Bulletin No. 10, Entomological Series, 

 Experiment Station of the Hawaiian Sugar Planters' Asso- 



