16 PROCEEDINGS OP THE NATIONAL, MUSEUM vol.80 



Type locality. — Uvalde, Tex. 

 Type sUde.—V.S.'^M. No. 1024. 



Four specimens at hand, all being taken from the type host, at the 

 type locality, by F. Adams, July 13, 1928. 



NEOSCHONGASTIA BREVIPES, new species 



Plate 2, Figure 4 



Palpus with second segment produced into an angle laterally ; first 

 seta plumose, second and third subplumose. Palpal thumb small, 

 short, inconspicuous ; palpal claw slender, curved, trif urcate distally, 

 the middle prong surpassing the others, which are subequal. Cheli- 

 cerae strongly curved and very sharp; teeth minute to vestigial. 

 Dorsal plate about twice as broad as long, provided with an anterior 

 projection bearing the median seta, posteriorly not broadly rounded; 

 median seta slightly smaller than antero-lateral setae, postero-lateral 

 setae longest. Pseudostigmata situated slightly behind a line drawn 

 between the bases of the two postero-lateral setae and about as far 

 from each other as each is from the postero-lateral seta on its side. 

 First pair of eyes situated about three times their diameter from the 

 dorsal plate, second pair degenerate, without corneas. Dorsal setae 

 about 50, all but 6 being arranged into five transverse rows. Legs 

 rather short; tarsus I with dorsal spine slightly curved and situated 

 about its length from the base of the segment, subterminal seta some- 

 what spikelike and situated on a broad low tubercle. 



Length of unengorged larva, 0.29 mm. ; width, 0.16 mm. 



Type host. — ^\^niite-footed mouse {Peromyscus leucopus novehora- 

 censis). 



Type locality. — College Park, Md. 



Type slide.— U.S.'^M. No. 1025. 



Sixteen specimens obtained from the type host (individuals C. P. 2, 

 C. P. 5, and C. P. 7) by H. S. Peters and the writer, May 3, 1929. 

 This species is closely related to signator., new species, but differs from 

 it in having about 10 less dorsal setae, the posterior eye degenerate, 

 in the shape of the dorsal plate, and in a few other characters. 



ENDOTROMBICULA PENETRANS, new species 

 Plate 3, Figxjres 1, 2 



Palpi laterally rounded; first seta simple, second tj'^pically with 

 two barbs, third with three barbs. Palpal claw trifurcate, middle 

 prong much the stoutest, lateral prongs subequal, all prongs of about 

 the same length. Palpal thumb longer than broad, not swollen, 

 extending to middle of palpal claw. Chelicerae strongly curved and 

 very sharj:) at apex, each with three sharp, recurved teeth on the upper 

 margin and a vestigial lateral tooth near the ventral margin. Dorsal 



