1901.] NATUKAL SCIENCES OF nilLADELPHIA. o95 



Ammotreoha peninsulana (Banks). 



Clcobis jx'/iinsfildna Banks, I'roc. Calif. Acad. Sci. (3), Zool., I, 290, 



1898. 



One specimen from La Cueva, Organ Mountains, September 2, 

 at light in tent running over the blanket ; another from Las 

 Vegas Hot Springs, January. 



ACARINA. 

 Trombidium gemmosum n. sp. 



Body above densely clothed with short, thick, but scarcely 

 clavate, hairs; below with short, stiff, pointed bristles ; legs and 

 palpi with fine slender hairs. Body once and one-half as long as 

 broad, broadest in front, plainly constricted near middle above the 

 third legs, the dorsum with several small impressed spots. Legs 

 very short; leg I about as long as width of body, last joint but little 

 swollen, no longer than preceding joint; fourth legs not reaching 

 beyond tip of body. Palpi short; second joint much swollen 

 above, below with long hairs; third rather longer than broad and 

 plainly narrower at tip; fourth quite long, ending in a long stout 

 claw; fifth, or thumb, clavate, hardly reaching beyond the claw, 

 with short, simple hairs. Color red. 



Length 2.4 mm. 



Several specimens from Las Vegas in January (Cockerell), one 

 from Eagle creek, White Mountains (Towusend). Closely related 

 to T. smbruin, but with shorter legs,, and shorter terminal joint to 

 leg I. Mr. Cockerell states that this species is extremely abundant 

 at Las Vegas. 



Trombidium magnificum Le Conte. 



Trombidium magnificum Le Conte, Proc. Acad. Nat. Sci. Philad., 1853, 

 p. 145. 



I have seen specimens from several parts of southern New 

 Mexico. 



Rhyncholophus sr>. 



Several specimens from Beulah. Very similar to R. simjilex, 

 but, I think, different. 



Tetranychus bimaculatus Harvey. 



Tetrani/chxs bimaculatus Harvey, Kept. Me. Exp. Sta., f. 1892 (1893), 

 p. 133. 



Specimens from Mesilla Park on violet leaves (in cultivation) 

 appear to belong to this common species. They were found by 



