MITES OF SUBFAMILY HAEMOGAMASINAE — KEEGAN 261 



two setae, one distal and one proximal. Anterior single and middle 

 paired maxillary setae relatively closer than in female. Palpi and 

 legs as in female. 



Nymph. — Dorsal shield, dorsal and ventral body setae, tritosternum, 

 and presternal area as in adult. Setation of ventral shield as in male 

 in that accessory setae, which number about 20, are not present in 

 central portion of shield or on its lateral margins. Anal shield as in 

 adults. Endopodal and metapodal shields not seen. Peritreme not 

 clear. Epistome as in adults. Chelicerae as in adult female. Palpi 

 and legs as in adults, may be even relatively shorter. 



Size. — Three female specimens measured 1,550/*, l,54:0ju,, and 1,375/1 

 in body length. The same specimens measured 900/*, 950/t, and 850/* 

 in width. The only male measured 1,175/* in length and 750/* in width. 

 Two nymphs were 1,050/t and 955/i long and 650/* and 625/i wide. 



Distribution and hosts. — Has been taken only from Dos Palmos, 

 Calif., on Perognathus penicillatus angv^tirostns., March 23, 1934; 

 Perognathus spinatus, March 1934; and Perognathus sp., March 25, 

 1934. 



Type. — A female (U. S. N. M. No. 1887) taken on Perognathus peni- 

 cillatus angustirostris at Dos Palmos, Calif., March 23, 1934, by H. S. 

 Gentry. 



Paratypes. — A male on slide with type, one female, two nymphs, 

 Dos Palmos, Calif., from Perognathus spinatus., March 1934, H. S. 

 Gentry. 



ISCHYROPODA ARMATUS. new species 

 FiGXJKE 54 



Female. — Dorsal shield rounded posteriorly not covering entire dor- 

 sal surface. Usual pair of apical setae smooth and flanked by a pair 

 of larger, barbed setae. Most setae of dorsal shield 20/* to 40/i apart 

 and about 40/* in length; those in central portion may be closer to- 

 gether ; most setae on shield nearly as large as usual apical setae ; some 

 at margins larger; some, particularly at margins, barbed. Dorsal 

 body setae equal in size to marginal setae of shield ; many are barbed. 

 Tritosternum barbed. Presternal area sculptured; spines on all su- 

 tures. Sternal shield rectangular, with rounded corners and a slightly 

 invaginated posterior margin ; in addition to the three pairs of usual 

 sternal setae there are several large accessory setae, which varied in 

 number from 5 to 10 (means 7) in a series of 23 females; these are 

 about two-thirds as large as the usual sternal setae and like them are 

 smooth. Bases of usual setae embossed ; sternal pores relatively long 

 and curved; centrally located accessory setae slightly smaller than 

 those more lateral in position. Genitoventral shield bulbous poste- 

 riorly and not reduced in size; only setae on anterior half of shield are 

 usual pair of genitoventral setae; accessory setae are smaller and 



