1916 Pomona Journal of Entomology and Zoology, Vol. VIII, No. 1, Mar. 



New Californian Mites 



Nathan Banks 



The following new specias form part of an Interesting collection 

 of mites recently sent by Dr. Hilton for determination : 



Trombidhim perscahrum n. sp. 



Red. Body about one and one-half times as long as broad, sub- 

 pyriform, broadest at humeri, broadly rounded behind. Cephalo- 

 thorax very short, with crista reaching almost to the hind margin 

 and there enlarged, and with a long fine hair arising from each 

 sensilla. Eyes near lateral margin on a very short elevation. Body 

 clothed with short, capitate hairs with roughened tips, some near 

 the eyes are longer than the others. Among these capitate hairs are 

 tufts of shorter spine-like hairs. Legs also clothed with similar, 

 but mostly more clavate than capitate hairs, roughened on sides 

 and end; some of the apical joints beneath have more slender hairs, 

 and tarsus I. has them only on the base above, elsewhere with long, 

 fine hairs. Leg IV. is about as long as the body, the last joint as 

 long as the penultimate; leg L plainly shorter than the body, tarsus 

 L fusiform, longer than the penultimate joint and about twice as 

 broad. Palpi rather stout, basal joints with clavate hairs above, 

 below with simple or pectinate hairs, and similar hairs on the fourth 

 joint. Thumb as long as third and fourth joints together, cylin- 

 drical, rather longer than the claw. 



Length, 1.4 mm. 



From Claremont, California, January. 



Differs from T. scahrum in having the clavate hairs on legs and 

 palpi, and in the cylindrical thumb. 



Erythrceiis posticatus n. sp. 

 Body dark (probably red in life), legs pale. Body about one 

 and two-thirds times as long as broad, broadly rounded behind, as 

 broad at hind coxa as at humeri; cephalothorax narrowed in front, 

 crista short, swollen at hind end, one eye spot each side. Body and 

 legs clothed with simple hairs, not very densely, and about as long 



