OF WASHINGTON, VOLUME XV, 1913. 11 







autennal funicle, but it is as peculiar in its relation to North Amer- 

 ica and European species as it is to those of Australia. 



Genus LEIMACIS Foerster. 



A species of this genus (peregrina Perkins) has been described 

 from Honolulu and I have an Australian species captured in 

 North Queensland; the two species are distinct, since they differ 

 in general coloration and markedly in the ciliation of the fore- 

 wing and length of the antennal club. 



SUBFAMILY MYMARIN.E. 

 Genus ANAGRUS Haliday. 



1. Anagrus armatus (Ashmead). 



In my paper on Austrialian Mymaridee, mentioned previously, 

 I will give evidence that this species is common to North America, 

 the Sandwich Islands, the Fijian Islands, and to Australia. The 

 matter need not be gone into here, but I desire merely to account 

 for its occurrence in these widely separated countries. The species 

 was first described from Florida in North America, more than 

 twenty years ago. Recently, I showed that it was very common 

 in North America, and the evidence which I will present in the 

 paper referred to shows that it is distributed from the east coast 

 of the United States as far west as the Rocky Mountains and is 

 parasitic upon leaf-hopper eggs deposited in the soft parts of 

 various plants, those recorded being the grape and apple (both 

 inferred, since the parasites appeared from twigs of those plants 

 infested with external hosts which are very doubtful hosts of this 

 parasite), an economic Empoasca (a definite, unpublished record 

 from host egg in leaves) and from a Liburnia on grass ; also Perkins 

 records it from Liburnia or similar eggs in Australia, the plant 

 doubtless sugar cane, another grass, but no statement is made 

 that it was originally found on that plant. However, Perkins 

 had discussed the parasite as an associate of the sugar cane and 

 introduced it into the Sandwich Islands for the purposes of the 

 economic entomology of that crop. 



The above facts, namely, that the species occurs in four widely 

 separated countries and that it is associated with cultivated plants 

 widely transported in commerce, represent effect and cause, since 

 I believe that little or no doubt can be entertained otherwise. 

 The opportunities for the distribution of this insect during the 

 last century from one continent to another by commerce have 

 been enormous, for what plants have been more widely inter- 

 changed than the grasses and fruits? There is nothing to con- 

 tradict this view. This species, also, is very similar to, yet dis- 



