PAPEE I CARRIKER ON MALLOPHAGA 9 



the thoracic segments and abdomen are of more or less the same propor- 

 tions as in the other species of the group, as well as the chaetotaxy. 

 Pleurites are not visible, nor are they shown in Kellogg's figure, tergites 

 are the usual dark transverse bands, with intermediate hyaline spaces, 

 common to the group. 

 Measurements of a cotype are given below. 



M. praecursor 9 



Body 

 Head: 



frons 



temples 



occiput 

 Prothorax 

 Pterothorax 

 Abdomen 



Menacanthus picicola (Packard) 



Menopon picicola Packard, 1873, in Hayden, Rept. U.S. Geol. Surv. Terr. 1872, 



p. 731, fig. 58. Hosts: Picoides arcticus and P. dorsalis. 

 Menacanthus picicola. — Hopkins and Clay, 1952, Checklist of Mallophaga, p. 214. 



Hosts: Picoides arcticus (Swainson) and P. [tridactjlus] dorsalis Baird. 



I have not been able to secure a specimen of this species. Packard's 

 figure and description leave no doubt of the correctness of the host, but 

 the details of both description and figure are of very little comparative 

 value, and until fresh material can be secured from the type host {Picoides 

 arcticus), its correct systematic position must remain uncertain. It is 

 certainly very closely related to other species of Menacanthus from North 

 American Picidae. 



Menacanthus colaptis (Durrant) 

 Figure i:Z,b,c 



Menopon colaptis Durrant, 1908, Ohio Nat., vol. 8, no. 7, p. 355, fig. 1 H. Host: 



Colaptes auratus. 

 Menacanthus colaptis. — Hopkins and Clay, 1952, Checklist of Mallophaga, p. 209. 



Host: Colaptes auratus [luteus Bangs]. 



Through the kindness of K. G. Emerson, I have been able to examine 

 a fine pair of what is presumably this species, from Colaptes auratus borealis 

 Ridgway, collected by R. B. Williams at Ruke Bay, Alaska, Sept. 5, 1949. 



There is very little resemblance between this species and M. pitius, new 

 species, from the Chilean flicker {Colaptes pitius), even the cf genitalia 

 being quite distinct (see figures). The head is short and wide, with flatly 

 rounded frons. 



