32 A. D. MICHAEL ON GLYCIPHAGUS TALMIFER. 



is not unusual with French draughtsmen. These hairs, both in the 

 male and female, appear to form good sexual distinctions, as they 

 are absent in the nymphs, which are devoid of sexual organs, but in 

 other respects resemble the perfect creatures, both male and female. 



The colour is clear, grayish white, the body is flattened and 

 attenuated in front, but more so in the male than in the female, 

 giving the former a more pear-shaped and the latter a squarer 

 appearance. The transverse depression of the skin on the back is 

 marked by a line of strong warts. 



The males are smaller than the females. Robin and Fumose 

 give the average sizes as follows : — Males, *20 to -25 mm. long ; 

 •14 to '16 mm. broad. Female, "30 to "35 mm. long ; '18 to '22 

 mm. broad. 



The legs are larger in the male ; the tarsi alike in both sexes 

 — nearly as long as the width of the body ; the sucker is larger than 

 in most species of the genus, the claw monodactyl, and extremely 

 small. 



The male organ is placed between the insertions of the third pair 

 of legs, and does not reach the insertion of the second pair ; the 

 vulva is placed between the insertions of the third and fourth pairs 

 of legs, and is considerably enlarged posteriorly. During copula- 

 tion the two remain in contact by the ends of the abdomen, and the 

 female continues to walk dragging the male. 



The anal appendage (to the females only) is a short truncated cone. 



The palpi are cylindrical and three -jointed. 



The larva is hexapod, about half the size of the imago, and 

 devoid of the anal appendage and sexual hairs on the back. 



The Nymph is octopod, larger than the larva, but is devoid of 

 sexual organs, anal appendage, and sexual hairs on the back. 



The egg is a long oval, depressed on one side. 



The pace of the creature is slow, but the males walk faster than 

 the females. 



The species frequents the dust and walls of damp cellars. 



DESCRIPTION OF PLATE III. 



Fig. 1. — Male. Upper side, X 200, a, Sexual hairs. 



Fig. 2. — Female. Under side, X 200. a, Anal projection; b, Vulva. 



Fig. 3. — Leaf -like Lair, X about 1,000. 



Fig. 4. — Mandible, X about 1,000. 



Fig. 5. — Tarsus and Claw, X about 1,000. 



