﻿MALLOPHAGA FROM GUAM CARRIKER 17 



convex, with square angles at sides, and sides of head straight and 

 slightly divergent to base of antennae; the hairs along frons and sides 

 of head are slender, of fair length, and with three long hairs just in 

 front of the antennary fossae. In the male the frons is strongly rounded, 

 with lateral angles also rounded and with a deep lateral constriction 

 at base of palpi. Around the whole frontal margin, anterior to the 

 constriction, is set a series of heavy spines, with various others on 

 the dorsal surface. In all other respects the heads of the two sexes 

 are similar. Also, in the male the hairs of the abdomen are shorter 

 and heavier, especially on the ventral side. 



ACTORNITHOPHILUS FUNEBRE CANDIDUS. new snbspeciefl 



Type.— 15. S. N. M. No. 58963, female adult, from Gygis alba, 

 collected by Rollin H. Baker on Guam Island (Marianas), May 25, 

 1945. 



Diagnosis. — Similar to typical funebre in shape of head, thorax, and 

 abdomen and in most of the chaetotaxy but much smaller (body 2.58 

 by 0.89, head 0.477 by 0.673, against body 3.1 by 1.50, head 0.50 by 

 0.78). It differs further in the absence of the blackish marginal band 

 around the head, this band being present only along the posterior 

 margin of the temples and occipital margin. The lateral pitchy 

 markings on the thorax are about the same, but those of the abdominal 

 pleurites are entirely absent, those sclerites being uniformly light 

 brown in color, a little darker than the sternites. 



The tergal plates are apparently much paler, as shown by their 

 posterior portion (in segments II to VI) where the sternites are nar- 

 rower than the tergites. 



The chaetotaxy of the abdomen is also slightly different. In typical 

 funebre the hairs along the posterior margin of tergites extend only 

 to the inner edge of the pleurites, while in candidus there are always 

 one or two hairs on the pleurite, near its inner edge. Kellogg gives no 

 description of the ventral abdominal chaetotaxy, but that of candidus 

 seems to agree very closely with a female of funebre in my collection 

 from Larus serranus. 



There is a series of short, stiff, pustulated hairs along the posterior 

 border of sternites II to VII, and in addition many hairs of same size 

 and type are scattered irregidarly over the entire surface of sternites 

 II to VIII, more abundantly along the sides of sternites IV and V. 

 Along the posterior margin of pleurites II to VII is set a series of four 

 to eight short slender spines, longer toward the inner edge and most 

 numerous on pleurite V. Segment IX is longer than the others, 

 rounded posteriorly, and with a double fringe of very fine setae around 

 the tip, one on the margin of the sternal plate, the other dorsally 

 along the hyaline border. 



