96 PROCEEDINGS ENTOMOLOGICAL SOCIETY 



NEW AMERICAN MITES. 



BY NATHAN BANKS. 

 (Plates I and II.) 



The following new species are mostly of some economic 

 value, and will be referred to in economic literature, so I 

 herewith present their description. 



Tarsotomus erraticus, new species. 



Red. Body two and one-half times as long as broad, in front narrowed 

 and rather roundedly pointed; this narrowed front part bears a number 

 of long, stout, erect bristles, a few shorter, more curved ones on the hind 

 border of body. Palpi stout, the thumb apparently three-jointed, tip 

 of palpus with two approximate curved claws, with crenulated margins, 

 all joints of palpi with stiff, erect bristles. Front legs rather longer than 

 body, third and fourth pairs much longer than body, hind tarsi very 

 slender, all legs with stiff bristles, those on basal joints simple, those on 

 tarsi scabrous or hairy, a pair of long bristles at tip cf metatarsi; about 

 twelve to fourteen joints in the tarsi, the basal ones longer than broad. 



Length, 1 mm. 



From Springer, New Mexico, July 5, on ground (C. N. 

 Ainslie). 



Erythraeus arvensis, new species. 



Red. Body about two and one-fourth times as long as broad, broadly 

 rounded behind; dorsal groove reaching as far back as eyes, and enlarged 

 at each end; one large eye each side, about over coxae n. Body clothed 

 with short, slightly clavate hairs, all of one kind. Legs with larger simple 

 bristles, but those on the basal joints often curved. Legs shorter than 

 body, first pair about three-fourths the length of the body, patella, tibia, 

 and metatarsus subequal, each longer than femora, and fully three timec 

 as long as broad, tarsus about as long as metatarsus, but nearly twice 

 as broad. Hind legs with patella and tibia about equal, the metatarsus 

 rather shorter, and the tarsus only one-half as long as the metatarsus. 

 The thind joint of the palpus has a small tooth on outer side at tip, the 

 fourth joint is concave within, the inner tip pointed and recurved; the 

 thumb is situated in the concavity of the fourth joint; it is about two 

 and one-half times as long as broad, and bears about one dozen bristles 

 near its tip, most of them longer than the joint. Length, 1 mm. 



From Salt Lake City, Utah, August 2, swept from alfalfa 

 (Ainslie). 



Tenuipalpus cardinalis, new species. 



Color, bright red. Body about two and one-half times longer than broad, 

 tapering behind; cephalothorax occupying about one-third of the length; 

 a transverse groove near base of abdomen not reaching across. A pair of 

 long frontal bristles, one each side above second coxse at the anterior 



