February iSg6. 



PSYCHE. 



345 



and very short bristles posteriorly; anal 

 tubercle with long, stiff bristles. Legs long, 

 slender, spiny, especially on tibia; superior 

 claw long, rather straight, clearly bidentate 

 inside, with a sharp tooth in the middle and 

 another midwav between it and the tip; a 

 third tooth on the outside, nearly opposite 

 the last; inferior claw with straight, tapering 

 sides and an apical liair hardly longer than 

 the other claw; the extreme tip of the claw 

 is really free from the hair; on the inside of 

 the inferior claw, near the base, is a dilation 

 whose apex bears a short bristle. Furcula 

 pale, extending beyond ventral tube; manu- 

 brium stout; each dens with a row of long 

 spines on either side; mucrones tapering, 

 one-third length of denies, coarsely serrate 

 beneath. Average length, i 6 mm. 



Described from twelve specimens found 

 during October and until middle November 

 at Arlington, Mass. 



This species eats wet, decaying wood on 

 the imder side of pine logs, its color being 

 mimetic. The last specimens found, before 

 severe frost, were all females, which laid 

 numerous eggs in captivity when given 

 natural conditions of moist food, air and 

 darkness. These eggs, laid singly, were 

 spherical with strongly flattened base, trans- 

 lucent white, smooth, .2 mm. in diameter. 

 .15 mm. high and witli embryo quite unde- 

 veloped seveial days after deposition. 



Papirins testl(diiiciitiis, n. sp. 



Dark purple, almost black, with conspicu- 

 ous wax-yellow patterns. Head large; face 

 with large markings and a few short bristles ; 

 vertex with a few longer bristles and a stirrup- 

 shaped mark on middle; behind this, a long, 

 broken, transverse band; eyes black; an- 

 tennae seven-tenths the length of body, 

 purplish; basal segment twice as thick as 

 second, crenate apically; second on anterior 

 edge of first, five times as long, somewhat 

 petiolate, vvilh a iew hairs; third equalling 



first two, slightly petiolate, giadually form- 

 ing false sub-segments distally, of which 

 seven are evident, followed by three swollen 

 ones, the penultimate sub-segment being 

 much dilated; terminal segment equal to 

 basal in length ; third and fourth segments 

 with whorls of long hairs. Abdomen ovate 

 dorsally, with a large pattern composed 

 principally of thick median longitudinal and 

 oblique bars; on anterior third of dorsum, a 

 median bar whose posterior end meets the 

 ver.tices of two widely V-shaped marks, one 

 on either side; behind this, a roughly scissor- 

 like pattern with two long oblique branches 

 on either side and a short, median anterior 

 lobe; on apical half of dorsum, a roughly 

 anchor-shaped marking and two large, pale 

 yellow tubercles, one on either side; dorsum 

 with a few long bristles anteriorly, many 

 shorter ones posteriorly; sides with large 

 roundish and elongated spots; anal tubercle 

 large, with several large spots and many 

 long, stiff bristles. Legs very long, slender, 

 hairy, with broad alternate bands of purple 

 and yellow except on tibia; claws white; 

 superior claw long, of rather uniform width, 

 bent only towards tip, divided on the inside 

 nearly into thirds by two prominent teeth; 

 inferior claw half as long, long conical, free 

 at extreme tip but apparently prolonged into 

 a bristle a little longer than the claw; a short 

 bristle on inside of inferior claw at its base. 

 Furcula long, nearly reaching the mouth, 

 purplish ; each dens with a roivof long spines 

 on either side; mucrones white, cylindrical, 

 apex rounded, one-third length of dentes, 

 serrate beneath. Length. 2.2 mm. 



Four specimens of this species were founti 

 in company with P. fini and also laid a few 

 eggs in captivity. These eggs differed from 

 those of/', pint only by being a little larger. 



Types of the above species have been 

 deposited in the Cambridge Museum of 

 Comparative Zoology. I wish to thank Mr. 

 Samuel Henshaw, of the museum, for his 

 kindness in supplying me with types as well 

 as literature of Thvsanura. 



