240 PROCEEDESTGS OF THE NATIONAL MUSEUM vol. loi 



EUHAEMOGAMASUS OUDEMANSI (Hirst) 



Figures 48, 49 



Haemogamasus oudemansi Hiest, Bull. Ent. Res., vol. 5, pp. 122-123, pis. 14-16, 

 1914.— ViTzTHUM, Zool. Jahrb. (Abt. Syst.), vol. 60, pp. 401-402, 1931. 



Eulaelaps maicsoni Womerslet?, Australasian Antarctic Exped. 1911-1914 : Scien- 

 tific Rep., ser. C, Zool. and Bot., vol. 10, pt. 6, p. 19, pi. 12, figs. 4-7, 1937. 



Female. — Dorsal shield widest at level of coxae II, not covering 

 entire dorsal surface; with six pairs of pores. Usual pair of apical 

 setae barbed and clearly largest setae on shield. Setae of shield rela- 

 tively sparse, 30/x to 60ju, apart and about 45)li in length; only usual 

 pair of apical setae barbed. Base of each seta of unprotected dorsal 

 integument with a spinelike posterior elongation ; these setae slightly 

 larger than those on shield; a few at lateral and posterior body 

 margins barbed. Lacinae of tritosternum heavily barbed. Sutures 

 of presternal area with spines. Sternal shield distinctive in that its 

 posterior margin is invaginated to a level about midway between 

 anterior and middle pairs of sternal setae. Anterior pair of sternal 

 setae barbed. Shield sculptured ; anterior pair of sternal pores nearly 

 parallel with anterior margin of shield. Genitoventral shield rela- 

 tively large and widely expanded posterior to coxae IV; extends more 

 than two-thirds of distance between coxae IV and anal shield; pos- 

 sesses usual genitoventral setae and 10 to 20 accessory setae in a 

 series of 14 specimens examined ; mean was 15 ; all accessory setae are 

 posterior to usual genitoventral setae and are smaller than the latter; 

 usual genitoventral setae are smaller than sternal setae; all setae on 

 shield are smooth. Anal shield nearly four-fifths as wide as long; 

 possesses only the three usual anal setae; two small prominences are 

 on the anterior margin of the shield. Anus about half its length from 

 anterior margin of shield; posterior unpaired seta longest; all are 

 smooth. Endopodal shields lacking. Metapodal shields long irregu- 

 lar rods or ovals. Peritreme distinctive in possession of a fenestra or 

 invagination on median surface of posterior end in most specimens; 

 posterior end of peritreme joined with coxal fovea; tubular portion 

 extends to level of posterior third of coxae II. Metasternal setae 

 smaller than sternal setae and larger than genitoventral setae. Ven- 

 tral body setae with posteriorly elongate bases ; about as large as dorsal 

 setae but may be larger, more often barbed on posterior body margin. 

 Epistome a slender, pointed spike ; fimbriae simple on proximal por- 

 tion of epistome, branched on its distal margin. Chelae about equal 

 in length ; fixed chela may be slightly the larger. Fixed chela nearly 

 straight; with a bifid tip and one tooth; a slender seta between tip 

 and tooth. Movable chela with a sharply curved tip and with two 

 teeth. Anterior pair of maxillary setae smooth, the others barbed. 

 Palpi with both barbed and smooth setae ; most ventral setae barbed, 



