292 CLARENCE M. WEED. 



Plialaiigiuiii cinereuin Wood. 



Phalangmm cinereum Wood, Comm. Essex Inst. vol. vi, p. 25; Weed, Amer. 

 Nat. vol. xxvi, p. 32; Trans. Am. Ent. Soc. xix, p. 269, pi. xvi. 



Male. — Body 7 mm. long; 4.8 mm. wide; palpi 5 mm. long. Legs: first, 29 

 mm. : second, 51 mm. ; third, 29 mm, ; fourth, 38 mm. Dorsum ash-gray, some- 

 times more or less brownish, with a wide, vase-shaped central marking, which 

 is sometimes obsolete. There is a transverse series of small spinose tubercles 

 behind the eye eminence, another row on posterior border of cephalothorax, and 

 one row on each abdominal segment except the last two; a curved series of 

 similar tubercles is found in front of the eye eminence. These tubercles have 

 whitish bases and acute black apices, and generally also have a spinose hair 

 arising on one side near the apex of the white portion and reaching beyond the 

 tip of the tubercle. In front of eye eminence there are two longitudinal series 

 of three each of these tubercles. Lateral borders of cephalothorax subsinuate. 

 Eye eminence low, canaliculate, with a series of five or six tubercles like those 

 on dorsum on each carina. Mandibles brownish white, tips of claws black ; 

 second joint and apical portion of first joint fui'nished with short, black, stiff 

 hairs. Palpi light brown, rather slender, first four joints with minute tubercles 

 and short black hairs; none of the angles prolonged; tarsal joint without tu- 

 bercles, but with bail's; claw moderately robust. Venter, including coxae, light 

 grayish brown, with many somewhat quadrangular patches of a more pronounced 

 brown, and scattered blotches of chocolate-brown. Trochanters light brown, 

 with many small tubercles; remaining joints of legs cinnamon-brown, more or 

 less annulated with lighter and deeper shades; angular, with longitudinal rows 

 of black spines: sheath of genital organ subcylindrical, truncate; shaft robust, 

 with two lateral oval openings near distal extremity, then contracted into a blunt 

 scoop-shaped piece, turned upward at nearly a right :ingle and terminating in a 

 slender, acute point. 



Female. — Body 8 mm. long: 5 mm. wide; palpi, 5 mm. long. Legs: first. 23 

 mm.; second, 42 mm.; third, 29mm.; fourth, 31 mm. Differs from male as 

 follows: Body larger, rounder. Dorsum darker gray, more mottled, central 

 marking more distinct; tubercles on dorsum smaller, those on eye eminence 

 more numerous, and those forming the longitudinal series in front of eye emi- 

 nence also more numerous. Palpi with hairs, but without tubercles. Legs with 

 annulations more distinct; trochanters without tubercles; spines on femur less 

 prominent, and those on tibia obsolete; narrow quadrangular patches on venter 

 of abdomen arranged in transverse series. Distal joints of ovipositor blackish ; 

 about thirty in number. 



Brookings, South Dakota. 



«»> — ■ 



EXPLANATION OF PLATE V. 



Fig. 1. — Mesosoma nigrum % . Natural size. 



" 2. — Parts of same. Magnified. 



■• 2a.— Body. 



'• 26. — Eye eminence. Side view. 



" 2c. — Eye eminence. Front view. 



" 2d. — Palpus. Side view. 



'• 2e. — Claw of jialpus. Side view. 



