NORTH AMERICAN PHALANGIID.'E. 263 



liiobuiiiiiii vittatiiiu dor.satiiiii (Say) Weed. Pliites XII. XIII. XIV, 

 fis- 2. 



Phalangium dorsatum Say, Jour. I'liil. Acad, ii, p. (5G, C-onipl. writ, ii, p. 13. 



Phalaiigiiim dorsatum Say. Wood, Conim. Essex Inst, vi, p. 18. 



Liobunum dorsatum (Say). Weed, Ainer. Nat. xxi, p. 935. 



Liobunum dorsatum (Say). Weed, Bull. 111. State Lab. Nat. Hist, iii, p. 83. 



Liobunum vittatum dorsatum (Say). Weed, Aiuer. Nat. xxvi, p. 786. 

 Male. — Body 6 mm. long ; 4 mm. wide ; palpi 6 mm. long. Legs : first, 35 mm. ; 

 second, 71 mm.; third, 36 mm.; fourth, 50 ram. Dorsum granulate; in fully 

 colored adults of a deep reddish brown color, with a well-marked dark stripe 

 which begins at the eye eminence, expands for a short distance, then contracts 

 until it reaches the cephalic portion of the abdomen, whence it runs with par- 

 allel sides a short distance, then very slightly expands until it reaches the caudal 

 third of the abdomen, where it contracts and runs as a stripe to the anus. Cepho- 

 lothorax with an irregular, parallelogrammatic, dark V-shaped marking cephalad 

 of the eye eminence, sometimes obsolete, especially in older specimens. In some 

 individuals there is .so much black cephalad of the eye eminence that the central 

 marking appears to begin on the cephalic margin of the cephalothorax. Eye 

 eminence of about equal height, length and breadth, sloping slightly backward, 

 dark above, canaliculate, with a few (two to five or six) sub-obsolete acute black- 

 ish tubercles. Mandibles very light brown, tips of claws black ; dorsal surface 

 of second joint sparsely covered with short spinous hairs. Palpi long, reddish 

 brown, depth of color varying with the rest of the body ; femur with a row of 

 short conical tubercles on its outer ventro-lateral surface, commencing near the 

 base and running to the apical extremity, where there are about a dozen similar 

 tubercles on the ventral surface; another short, slightly oblique series ou the 

 dorsal surface, beginning at the ai)ical margin and extending distally about one- 

 fourth the length of the femur; patella with a row of tubercles on its outer 

 ventro-lateral surface, similar to those on the femur, and a few sub-obsolete ones 

 on its dorsal and ventral surfaces; tibia with two nearly parallel rows of tuber- 

 cles, one on the ventral and the other on the outer ventro-lateral surface ; a short 

 row also on the distal portion of its inner ventro-lateral surface; tarsus .sparsely 

 covered with stiff hairs, and furnished with a well pronounced row of dark tu- 

 bercles on its inner ventro-lateral surface. Ventrum varies from whitish to dark 

 reddish brown, with well-marked granulations in older specimens. Coxa' 

 slightly tuberculate, each having a row of short tubercles on the cephalic margin. 

 Legs varying from light grayish brown to black, with darker annuiations. ; shaft 

 of penis slender, distally bent nearly at right angles, and terminating in a very 

 acute point. 



Female. — Body 7 mm. long; 4.5 mm. wide; palpi 5 mm. long. Legs: first, 34 

 mm. ; second, 67 mm. ; third. 34 mm. ; fourth, 44 mm. Differs from male as fol- 

 lows: Body much thicker and more rounded. Color generally darker, with less 

 reddish. Legs brownish rather than black. Palpi very much more slender, 

 shorter, and having the tubercles partially replaced by hairs. Apical portion of 

 ovipositor whitish. 



I have adult specimens of this species collected at Hanover during 

 August and September; at Mascoma Lake, September lOtii ; at 

 Keene, September 1st ; and at Hartland, Vt., during August. It 

 generally occurs in fields, though occasionally found around buililings. 



TRANS. AM. ENT. SOC. XIX. NOVEMBER, 189-2. 



