THE SCALE INSECTS OF THE SUBFAMILIES MONOPHLE- 
BINAE AND MARGARODINAE TREATED BY MASKELL. 
By Haroxtp Morrison and Emiry Morrison, 
Of the Bureau of Entomology, United States Department of Agriculture. 
INTRODUCTION. 
The following paper is, in a sense, a continuation of the work begun 
through the publication of a previous article in these Proceedings' 
by the same authors, and the explanation of the circumstances which 
permitted the performance of that work, as given in the earlier paper, 
applies with equal aptitude to that which follows. 
The species of the two subfamilies treated herewith, together with 
those of one other subfamily, the Ortheziinae, appear to be fairly 
definitely set off from the other members of the family Coccidae 
through the possession of abdominal spiracles in all stages and com- 
pound eyes in the adult male, but since Maskell described no new 
species of Ortheziinae, and since his collection apparently contains 
no improperly identified material belonging to this subfamily, no 
further consideration has been given in this paper to the species of 
Ortheziinae in his collection. Three species in this group, Mono- 
phlebulus fuscus (Maskell), Ultracoelostoma assimile (Maskell), and 
Coelostomidia zealandica (Maskell), have already been redescribed in 
detail and discussed in the earlier paper, and are in consequence only 
briefly referred to in the following pages. 
In those genera where a study of the included Maskell species has 
involved a consideration of most or all of the other congeneric species 
advantage has been taken of the opportunity to present the results 
of such extended study, and to describe certain apparently new 
species discovered in the course of the work. 
The text figures showing the structural characteristics of the vari- 
ous species have been prepared by the junior author. 
Subfamily MONOPHLEBINAE. 
Genus MONOPHLEBUS Burmeister. 
MONOPHLEBUS TAMARINDUS Green. 
References— Monophlebus, sp. Maskell, Trans. New Zealand Inst., 
vol. 25, for 1892 (1893) p. 245.— Monophlebus tamarindus Green, 
Mem. Dept. Agr. India, Ent. Ser., vol. 2, No. 2, Apr., 1908, p. 17. 
1 Proc. U. S. Nat. Mus., vol. 60, art. 12, no. 2407, 1922, pp. 1-120, figs. 1-37, pls. 1-6. 
No. 2463.—PROCEEDINGS U. S. NATIONAL Museum, VOL. 62, ART. 17. 
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