Specimens Host Locality Date Collector 



2 slides Larus marinus Marshfield, Mass. XII-30-1930 USNM 

 1 slide " " " " XII-30-1930 BMS 



Quadraceps omatus paulschulzei (Timmermann , 1949) is found on 

 the Black-legged Kittiwake. 



Another subspecies, Quadraaeps omatus striolatus (Nitzsch, 1866), 

 is found on Larus hyperboreus Gunnerus — Glaucous Gull and Larus argenta- 

 tus Pontoppidan — Herring Gull. 



Specimens Host Locality Date Collector 



7 9 , 3 cT Larus argentatus Lee, NH V1I1-25-196A J.E.K. 



Measurements : Quadraceps omatus 



Head Length .57 .58 



Head Width .55 .60 



Prothorax Width .30 .31 



Pterothorax Width .49 .49 



Abdomen Length 1.12 1.18 



Abdomen Width .66 .69 



Total Length 2.05 2.13 



Quadraceps punctatus regressus Timmermann, 1952 



Quadraceps punctatus regressus Timmermann, 1952. Ann. Mag. Nat. 



Hist. , (12) , 5: 215. 

 Type host: Larus argentatus Pontoppidan — Herring Gull. 



This species may be separated from Quadraceps omatus which may be 

 found on the same host, by the following characters: head always con- 

 siderably longer than wide, pointed; mandibles weak and small; antennae 

 uncolored. In Q. omatus the head is a little longer than wide; the 

 mandibles are large; and the last segment of the antenna is brown in 

 adult forms. 



Quadraceps punctatus sublingulatus Timmermann, 1952, is found on 

 Larus delauarensis Ord — Ring-billed Gull and Larus Philadelphia (Ord) 

 differing from regressus in lacking dark anterior spots on the ptero- 

 thorax. 



Quadraceps ravus (Kellogg, 1899) 



Nirmus furvus ravus Kellogg, 1899. Occ. Pap. Calif. Acad. Sci., 



6: 14, pi. 2, fig. 1. 

 Degeeriella subfusca Blagoveshtchensky , 1948. Mag. Parasit., 



Leningr., 10: 286, figs. 20 and 20a. 

 Type host: Actitis macularis (Linnaeus) — Spotted Sandpiper. 



A dark species, short and quite stout, lacking median longitudinal 

 uncolored line across the first 6 or 7 abdominal segments. 



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