﻿MALLOPHAGA FROM GUAM — CARRIKER 



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long, heavy spines on their posterior margin, near their outer (or 

 lateral) portion, while the sternites of same segments bear similar 

 spines ranging two to nine in number, and at their lateral, posterior 

 edge. There seems to be little difference in the abdominal chaetotaxy 

 in the two sexes, except on segments VIII and IX. The male genitalia 

 are simple and typical for the genus. 



This species is reminiscent of the genus Machaerilaemus Harrison 

 in the chaetotaxy of the abdomen (the spines) and in the somewhat 

 similar type of gular plate. 



MEASUREMENTS OF TYPES OF MENACANTHUS SPINIFERUS APLONIS 



Genus MYRSIDEA Waterston 



MYESroEA CUCULAKE (Nitzsch) 



Figure 4, e, f 



Menopon cuculare Nitzsch, in Burmeister, Handbuch der Entomologie, vol. 2, 

 p. 439, 1838. (Host: Sturnus vulgaris.) 



Two species of Myrsidea have been described from starUngs, M. 

 flavescens (Piaget) from Acridotheres cristatellus and M. cuculare 

 (Nitzsch) from Sturnus vulgaris. Harrison has made M. flavescens a 

 synonym of M. cuculare, but Uchida says that the abdominal sclerites 

 are different, and I dare say that they are distinct, at least subspecifi- 

 cally. The type host of M. cuculare is Sturnus vulgaris, which is 

 closely related to Aplonis opacus (Aplonis was split off from Sturnus). 



A large series of a Myrsidea (both sexes) was taken on three indi- 

 viduals of the Guam starling (Aplonis opacus guamae). These speci- 

 mens seem to be very close to Myrsidea cuculare (Nitzsch) in that 

 they have the first sternite of the abdomen strongly developed in 

 both sexes. This sternite reaches to the posterior margin of tergite 

 II in both sexes and has the posterior margin deeply concave and set 

 with a row of slender hairs, while at each side is the thickened portion 

 bearing four very heavy spines, the inner one very long (0.11 mm.) 

 and the outer a fourth as long. In the female tergites I and II are 

 invisible; III is narrow, faintly colored, and widely separated from 

 sternal plate I by a hyaline space. Tergites III to VII are strongly 



