672 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 56. 



Tip of tarsus bears a short, sickle-shaped claw, which is uncleft 

 to its tip; arising from the ventral surface of this claw, one-fifth 

 its length from base, are six radiating spurs, which are about haK 

 the length of the main claw. The usual series of four tenent hairs 

 arise by the sides of the base of the claw from the tip of the onych- 

 ium. "Thumb" of palpus short, wider than long, bearing at its 

 tip an unusually ample, oval-shaped "finger," wliich is almost as 

 thick as long, and whose base is just half as wide as tip of "thumb." 

 Near the upper distal angle are the two customary digituli which 

 slightly exceed the terminal "finger;" on upper side not quite mid- 

 way to base is a small, banana-shaped "finger" or sensilla one- 

 fifth the thickness of the terminal "linger," and between this and 

 base of "thimib" are two short hairs; a hair arises latero-ventrally 

 from the center of the "thumb." The claw on the penultimate joint 

 reaches to the dorsal "finger." Neither the penis nor the collar 

 trachea could be discerned in the preserved material. 



Type material from the upper side of pecan leaves, Texas. 



It has developed from a stud}^ of the type material that Banks's 

 species T. simplex is identical with P. viridis, and is iierewith reduced 

 through the operation of the priority rule. 



PARATETRANYCHUS CITRI (McGregor). 



Plate 79, fig. 15. 

 Tetram/chus {Faratetraatjclms) f;i7ri "McGregor, 1916, Ann. Ent. Soc. Ainer., vol. 



9, no. 3, pp. 284-288, pi. 2. 

 Tetranychus niylilaspidis Banks not Riley {Fentha lodes), 1900, U. S. Dept. Agr., 



Div. Ent., Tech. Ser., Bull. 8, p. 71. 



As pointed out in a paper by the present writer (20), the citrus 

 mite had never been described prior to that time. Banks had inter- 

 preted Riley's type material of Pentlialodes mytilaspidis to be the 

 citrus mite which we have shown was clearly not the case. 



Distinctly velvety-red in color. In size larger and more obese 

 than the majority of red sj>ider species. Female : Length, 0.305 mm. : 

 width, 0.230 mm. A single eye cornea on each side, twice as far 

 behind the subfrontal bristle as the latter's distance from the frontal 

 bristle. Dorsal bristles long, stout, arising from prominent tubercles 

 subfrontal bristles barely three times as long as frontals; bristles 

 sparsely pilose. Legs paler than body color, bristles arranged chiefly 

 in four longitudinal rows. Mandibular plate abruptly narrowed 

 anteriorly, tip rounded, usually with an almost imperceptible emar- 

 gination. Palpus is provided with a comparatively short "thumb," 

 bearing a terminal, shghtly clavate "finger" whose base is less than 

 half the width of tip of "thumb;" with two pseudo-fingers arising 

 on either side of the upper distal corner, which are not greatly 

 thicker than hairs; on upper side hardly midway to base with a 

 small "finger" between which and base are two short, stout hairs; 

 near the lower center of the outer side of "thumb" with a hair 



