No. 2394. XEW NEARARCTIC SPIDER MITES— EW IN G. 665 



SYNCALIGUS QUERCUS, new species. 



Plate 125, fig. 7. 



A small, yellowish species. Beak prominent; chelicerae very sharp 

 and needlelike, but each with two arms. Palpi rather short and 

 stout; claw rather strongly hooked toward the distal end; thumb 

 cylindrical, but slightly surpassing the claw and without three cleft 

 distal spine or finger. Abdomen with a few rather long, curved setae. 

 Legs moderate; claws large; empodium with very fine hairs none 

 of which appear to extend beyond the claws. Length, 0.20 mm.; 

 width, 0.12 mm. 



Type locality. — Piermont, New York. 



Type.— Cat. No. 23778, U.S.N.M. 



Two slides are in the United States National Museum collections, 

 both with the same date. This species can be distinguished from S. 

 mali (Ewing) and S. tridentifer, new species, by the absence of the 

 three-prolonged spine on palpal thumb. It is distinguished from 

 S. cardinalis (Ewing) by having the palpal claw almost as long as the 

 thumb, while in S. cardinalis the claw is so reduced as to be almost 

 esvtigial. Specimens were taken from leaves of oak by N. Banks ( ?). 



TETRANYCHINA TRITICI, new species. 



Plate 125, figs. 8 and 9. 



A medium-sized reddish brown, or sometimes greenish, species with 

 long front legs. Cephalothorax very broad and separated from the 

 abdomen by a distinct but not conspicuous groove. Two eyes, or 

 corneas, on each side of cephalothorax, near lateral border; corneas 

 of equal size and situated approximate; ocular pigment deep carmine. 

 Cephalothorax provided above with apparently four pairs of pectinate 

 setae; one pair on the front margin, one just in front of eyes, one pair 

 median to eyes and one pair near the middle of cephalothorax. A 

 pair of tracheal horns is located at the front margin of cephalothorax. 

 They are situated below the front setae and are about one-half as long 

 as the latter. Mouth parts conspicuous; mandibular plate over twice 

 as long as broad and not notched in front; palpal thumb exceeding 

 claw, not swollen, and bearing at its tip several small setae. Abdo- 

 men evenly rounded behind, broadest at the shoulders, and sparsely 

 clothed with short, indistinctly pectinate setae. Legs long, par- 

 ticularly the first pair, which is longer than the body; last pair next 

 in length, then third pair, while the second pair is the shortest. 

 Tarsus and tibia of leg 1 about equal; tarsus provided with a long 

 pair of tactile setae near its tip. Tarsal claw single, but provided 

 with a double comb of knobbed hairlike appendages, each comb 

 consisting of about 10 filaments. Tenent hairs as. usual. Length 

 (about), 0.5 mm.; width (about), 0.3 mm. 



