231 



MEGACHILIDAE 



Anthidium sp. (2 specimens). 

 Total : 2 genera Proctotrypoidea. 

 3 " Cdialcidoidea. 



1 '' Vespoidea. 



2 " Sphecoidea. 

 6 " A poidea. 



1-i genera, 10 species, 28 specimens. 



ANNUAL ADDRESS. 



Contributions to the Knowledge of the Dactylopiinae of 

 Hawaii. 



BY EDW. Ai. ElITJIIORN. 



It seems to be the custom at the annual meeting of the 

 Society for the President to read an annual address. In the 

 past I note that these addresses generally contained some ac- 

 count of the insect fauna of these Islands, or dealt with the 

 monographing of some special order, family or genus. 



It is my pleasure today to be able to present to you as my 

 address a contribution to the knowledge of the subfamily 

 Dactylopiinae, suborder Homoptera, family Coccidae. 



Ih dealing with this subject I must first call attention to 

 the great difficulty which is met with in the determination of 

 manv species of this subfamily. Especially is this true of the 

 genus Pseudococcus, the so-called mealy bugs. Many de- 

 scriptions are quite inadequate to use for determination, and 

 the literature is widely scattered. Much stress has been placed 

 on the measurements of the segments of antennae and other 

 appendages, and although usable at times, yet from general 

 experience such measurements cannot be greatly relied upon. 

 Many species have been described from dried specimens, oth- 

 ers from specimens in alcohol. The color, secretion and size 

 of such are only approximate at best. As all these insects, 



Proc. Haw. Ent. Soc. Ill, No. 3, September, 1916. 



