644 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.30. 



KEY TO GENERA. 



a ^ Empodiiil claw vestit^ial, amnate at base to tarsus of wldch it is merely a pro- 

 tuberance Anychus, new genus. 



a '-. ICnipodial claw (listinctly separated at base from distal portion of tarsus. 



b ' . Claw simple Neotetr anychus Tragardh. 



h 2. Claw complex. 



(• '. Claw cleft wit)i from 2 to (5 etjual divisions. 



(1 * . Claw divisions 2 Schizotetr anychus Tragardh . 



d ^. Claw diA-isions 4 ' to G Tetranychus Dut'oiir. 



c -. Claw appendiculate either at base or at a point l)otween it and middle point 

 with from 4 to 6 spurs. 

 .'/*. Dorsal spur of tarsus decidedly shorter than the ventral group of 



apurs Septanychus, new genus. 



d *. Dorsal spur more preeminent and much longer or about equaling the 

 appendiculate spurs: collar trachea straight, enlarged at end. 



Paratetr anychus Zacher. 

 ANYCHUS, new genus. 



This genus is thus far represented by a species from Florida and 

 one from Peru, South America. 



Spinning mites, having only a vestigial claw which is connate at 

 base with the tarsus of which it forms merely a protuberance. The 

 usual series of dorsal bristles is replaced by a series of rodlike or 

 spatulate appendages. 



Type. — Tetranychus (Anychus) lanlcsi McGregor. 



KEY TO SPECIES OF GENUS ANYCHUS. 



a '. " l<Hnger '■ on tip of palpal "thumb " terminal and much stouter than the two dig- 

 ituli, at base nearly as thick as tip of "thumb"; dorsal appendages IS, spat- 

 ulate-serrate A. banksi McGregor. 



a'. "Finger" on tip of palpal "thumb" ventro-terminal, less conspicuous than the 

 two digituli, at base about one-fourth as thick as tip of " thumb " ; dorsal append- 

 ages 26, noutapering, serrate, rodlike A. rusii IMcGregor. 



ANYCHUS BANKSI (McGregor). 



Tetranychus tensfci McGregor, 1914, Ann. Ent. Soc. Amer., vol. 7, no. 4, ]>. 357. 



Color rusty red, from underlying paired organs which occupy all 

 of the dorsal region excepting a median abdominal area and a 

 clear area containing the mandibular plate. Eyes (in moimted 

 material) translucent, directly over suture between coxae I and II. 

 The usual series of dorsal bristles is lacking, but a series of 18 spatu- 

 late-serrate hairlike appendages are distributed on the dorsal aspect 

 of the body as follows: One at either side of the mandibular plate 

 anteriorly, one just mediad of each eye, one just overlying each 

 coxa II, six forming a fringe at hind margin of body, and three along 



> All recent European authorities show four divisions of the tarsal claw for 7*. ielarius and T. aUhaeae 

 and others, but this type has not yet been seen in this country. 



