﻿386 PROCEEDINGS OF THE NATIONAL MUSEUM vol. lOo 



Menopon thoracicum var. fuscum (=MyfSi(leu fusca). Host: Raniphocelus 

 passerini passerini. 



Menopon dificile i=Menacanthiis ?). Host: Atlapetes brunnei-nucha hrunnei- 

 nucha. This species has very long peculiar head spines and an unusually 

 heavy gular plate which extends beyond the occipital margin. Specimens 

 must be cleared for further study. This may represent a new genus. 



Menopon palloris {=Myrsidea). Host: Stelgidopteryx ruficolUs fulvipennis. 



Menopon laticorpus (=Machaerilaeniu.s) . Host: ThamnophUus doliatus inter- 

 medins. 



ENTOMOLOGICAL NEWS, vol. 21, pp. 51-57, 1910 



Col pace ph alum spinulosum obscurum (=Actoniithophilus). Host: Arenaria 

 interpres morinella. Type in the Museum of the University of Michigan. 



Colpocephalum ocularis. Host: Arenaria interpres morinella= juv. of A. 

 obscurus. 



Colpocephalum subpustulattim {= Actor nithopMlus) . Host: Ceryle alcyon. 

 Type in the Museum of the University of Michigan. 



Menopon hirsutum. Host: Dendrocopos pubescens medianus. Genus uncertain, 

 but not a Menopon, since it has combs of spines on hind femora and abdom- 

 inal sternites. I have the same genus from several South American hosts, 

 including a woodpecker. Type in the Museum of the University of Michigan. 



Nitzschia latifrons. Host : Riparia riparia riparia. This is possibly a Myrsidea, 

 but without a reexamination of the type it is not possible to be certain. Type 

 in the Museum of the University of Michigan. 



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