April 1893.] 



PSYCHE, 



427 



before me show very young to half- 

 grown forms taken 30th May, 1S91 ; 

 some approaching maturity collected 

 during June ; and some fully developed 

 but not fully colored taken in July. 

 There appears to be but one brood a 

 year so that the species has a very long 

 feeding period. 



In a recent paper in the American 

 Naturalist (December, 1892) I have 

 discussed at some length the geograph- 

 ical variations of this Striped Harvest- 

 spider. 



LlOBUNUM VENTRICOSUM HYEMALE, Weed. 



Plates 13, 14. 



Phalangium ventricosum Wood, Coram. 

 Essex inst., vi, 32. 



Liobunum ventricosum (Wood). Weed, 

 Amer. nat., xxiv, 918; Trans. Am. ent. soc, 

 xix, 18S. 



Liobunum ventricosum hycmale Weed, 

 Amer. nat., March, 1893. 



Male. — Body 9 mm. long; 6 mm. wide; 

 palpi 8 mm. long. Legs: first. 52 mm.; 

 second, 101 mm.; third, 50 mm.; fourth, 73 

 mm. Body elongate, ahdomen subcorneal. 

 Dorsum, legs including trochanters cinna- 

 mon-brown, ventrum of a slightly lighter 

 brown, sometimes grayish brown. Dorsum 

 closely granulate with an indistinct darker 

 marking, and numerous small grayish spots 

 arranged in irregular transverse series. Eye 

 eminence black, except at base; rounded, not 

 canaliculate, smooth, or with a few small, 

 acute tubercles. Palpi rather slender, with 

 none of the angles prolonged; femur with a 

 very few small spinous tubercles and hairs; 

 patella strongly, and femur and tibia slightly, 

 arched; coxae minutely tuberculate, tipped 

 with white; trochanters and legs cinnamon 

 rufous; tarsi dusky. Legs long and mod- 

 erately robust. Genital organ of male "flat, 

 nearly straight, slender at the basal portion, 

 gradually widening and distally rather 



quickly expanded into a broad alate portion, 

 and then abruptly contracted into a mod- 

 erately robust, slightly curved point, which 

 is placed at an angle to the rest of the shaft; 

 at the base of the point a marked notch in 

 the end of the shaft." 



Female. — Body 11 mm. long; 6.2 mm. 

 wide. Palpi 7 mm. long. Legs: first, 48 

 mm.; second, 93 mm.; third, 46 mm.; 

 fourth, 6S mm. Differs from the male in 

 having a larger body, with the abdomen 

 often greatly swollen. 



This species passes the winter in a 

 half-grown condition. The eggs are 

 apparently laid during summer and 

 hatch early in autumn. The length of 

 the second pair of legs of young speci- 

 mens, taken at the Agricultural College 

 during October, 1892, varied from 15 

 millimetres to 33 millimetres. The 

 size of early spring specimens is repre- 

 sented in plate 14, fig. 1 ; and the struct- 

 ural details in fig. 2 of the same plate. 

 Such forms are described as follows : — 



Length 7 mm.; width 4 mm. Legs: first. 

 32 mm.; second, 60 mm.; third, 31 mm.; 

 fourth, 45 mm. Body soft. Dorsum smooth; 

 mottled brown. A distinct dark central 

 marking begins at eye eminence, and runs 

 two-thirds of the way to the posterior ex- 

 tremity; it contracts near the anterior border 

 of the abdomen, then expands in an even 

 curve, and again contracts in a similar way- 

 There is a deep oblique sinus just back of 

 each lateral pore of cephalothorax. On the 

 abdomen are scattered dark spots, arrange , 

 in irregular transverse series. Eye eminence 

 peifectly smooth; black about eyes with a 

 light brown longitudinal central marking-, 

 slightly longer than high; not at all canali- 

 culate. Mandibles light gray, with tips 

 blackish: sparsely provided with short black 

 hairs. Palpi slender ; mottled grayish-brown ; 

 all the joints provided with short, black, stiff 



