On some Mallophaga. 21 



Ord. Mallophaga. 

 Subord. Ischnocera. 



Farn. Phüopteridae. 

 Gen. Docophofiis Nitzsch. 



Docoplioi'ns /US i/o r Ulis Benny (1842). 



D. fiisiformis Benny, Mouogr, Anopl. Brit,, p. 84, tab. 1, fig. 2 (1842). 



— PlAGET, Les Pediculines, p. 86, tab. 6, fig. 7 (1880). 



— Kellogg, New Mallophaga III, p. 58, tab. 5, fig. 3 (1899). 



6 immature examples ou Arquatella maritima. 



Gjanoyri (Strömö) 15./8. 1912. K. Scheeibee leg. 



Not uncommon on Tringa sp.; recognisable even at an early 

 stage by the head, The adult clypeal outline varies considerably. 

 Generally it is concave but sometlraes almost straight. Piaget 

 figures the $, Kellogg the ^. 



Doco/ylioriis hnnieralis Benny (1842). 

 D. Mimeralis Benny, Monogr. Auopl. Brit., p. 88, tab. 5, fig. 7 (1842). 



3 cJcJ, 5 $$, 6 imm. on Nmnenius phaeopus. 



Grönhölm b. Strömnaes (Strömö) 12./8. 1912. Scheeibee leg. 



This beautiful form occurs also on Numenius arquata. Its 

 nearest ally is, we consider, D. cordiceps Piaget (1880), but humeralis 

 is much the larger insect. We figure for comparisou the male 

 genitalia of both forms. Piaget has already (Les Pediculines, tab. 6, 

 fig. 2a, 2b) drawn the apparatus of cordiceps but not on a sufflciently 

 large scale to show the points of difference. 



These points may be briefly indicated: 



1. The apparatus of humeralis is absolutely much larger than 

 that of cordiceps. 



2. The paramers are gently beut and broad in humeralis, narrower 

 and more abruptly bent in cordiceps. 



3. The endomers are together quadrate with a delicate tooth 

 on the distal edge of each (humeralis) but in cordiceps more narrowly 

 quadrate with the outer distal angle as it were cut off. 



4. The ventral hair placed in humeralis nearer the apex of the 

 paramer than in cordiceps, is probably a constant feature. 



