NOKTH AMERICAN PHAl.ANGIID^. 191 



varies from dark ferruginous brown to almost black ; in color of ventruin, wliii-h 

 is grayish rather than brown ; and in having the legs, except trochanters, brown 

 rather than black. 



Illinois: Cliampaign, June, July, 1887. Ohio: Clermont County, 

 August, 1890; Franklin County, July 7-10, 1890; Warren County, 

 June 28, July 23, 1890. Described from many specimens. 



The sexes of this species are quite unlike. In first going over my 

 collections I separated the males in one series and the females in 

 another, thinking them different species, but on finding that the 

 specimens of one of the su])posed kinds were all males and the others 

 all females, and that in nearly every instance the two forms had been 

 taken at the same time and place, I had little hesitancy in consider- 

 ing them the same. 



During July, 1890, this form was very common in central Ohio. 

 But it does not appear to be so in other places, as I have no speci- 

 mens among the many harvest spiders sent me by friends from other 

 States. 



I>iobunum niacnIo»«iiin (Wood) Weed. Plate VIII. 



Phalangium macidosum Wood, Comin. Essex Inst. vol. vi. pp. 31-32, 40. 

 Phalangium maculosum Wood. Underwood, Can. Ent. vol. xvii, p. 168. 

 Phalangium (f) maculosum Wood. Weed, Bull. 111. State Lab. Nat. Hist. vol. 



ili, p. 104. 

 Liohunu7n maculosum (Wood). Weed, Amer. Nat. vol. xxiv, p. 918. 



Male. — Body 8 mm. long; 4.5 mm. wide; palpi 5.5 mm. long. Legs: tirst, 19 

 mm. ; second, 33 mm. ; third, 21 mm. ; fourth, 26 mm. 



Female. — Body, 11 mm. long; 6 mm. wide; palpi 5 mm. long. Legs: first, 16 

 mm. ; second, 32 mm. : third, 20 mm. ; fourth, 27 mm. 



Body large; dorsum granulate, cinnamon-brown, with an indistinct darker, 

 vase-shaped central marking, beginning at the eye eminence, contracting slightly 

 on the first abdominal segment, and then slightly expanding and running with 

 nearly parallel! sides to the posterior extremity; a great many small yellow 

 spots on the abdominal segments arranged in irregular transverse series (in the 

 male under examination there is on the front margin of the middle of the first 

 abdominal segment, and between that and the eye eminence on the cephalothorax 

 transverse masses of minute golden dots) ; in front of eye eminence is a whitish 

 V-shaped mark. Eye eminence well developed ; black, except a whitish spot at 

 the base both in front and behind : contracting from base upward; scarcely 

 canaliculate; with two subobsolete rows of blackish tubercles. On the front 

 margin of the cephalothorax, directly in front of the eye eminence, is a patch 

 of three rows of small black tubercles, sometimes subobsolete ; other similar, but 

 smaller tubercles are scattered near the rest of the margin of the cephalothorax. 

 Mandibles brownish white, with tips of claws deep black. Ventral surface of 

 palpi very light brown, almost white; dorsal surface brown, femur and patella 

 darker than the rest; inner distal angle of femur and patella slightly prolonged 

 in female, scarcely so in male; femur, patella and tibia furnished with rows of 



TRANS. AM. ENT. SOC. XIX. JULY, 1^92. 



