PAPER I CARRIKER ON MALLOPHAGA 15 



In the author's collection are 1 cf and 2 9 9 from the type host, 

 collected by him at Rio Chinchipe, Peru, from which the figures were 

 made. 



In this species and exsonguis malherbi and extraneus, also with the same 

 generic host, we have the largest species of the genus known from the 

 Picidae. All three species are characterized by an unusual type of male 

 genitalia and head spines. The head is short and wide, with temples much 

 wider than frons and with the portion of head anterior to ocular slit as 

 long as the posterior portion. These species are characterized by ex- 

 tremely short, thickened head spines (see figures), very much shorter than 

 any other known species found on the Picidae; prothorax extends much 

 farther under the head, and the chaetotaxy of the head seems to be the 

 same as the rest of the genus, but that of the prothorax is decidedly diflferent, 

 as follows: The usual short spine in anterolateral angle is followed by 

 two very long setae, then a small spine, and in the posterolateral angle 

 two very long setae, with five more on each side of the posterior margin, 

 all very long, longer than width of pterothorax. There are 9 long setae 

 on each side of pterothorax, with numerous short sternal setae in median 

 portion, between second and third coxae; 9 to 15 setae along posterior 

 margin of tergites (including the angle) ; setae on posterior margin of 

 sternites shorter, finer and very numerous (about 20-21 on III and IV); 

 the patches of setae on third femora and sternite IV are short, fine, and 

 rather dense, much more so than ixipici pici and allies; fringe of setae around 

 anal opening and on margin of last sternite as shown in figure, as well 

 as that of the legs. 



Measurements are given below. 



M.e. exsanguis M.e. exsanguis M.e malherbi M.e. malherbi 



c? 9 d^ 9 



