188 THE CANADIAN ENTOMOLOGIST 



Tibia about half the width of the hand, convex on its inner edge, but with a 

 gentle concavity at its distal end. Femur not quite so wide as tibia and about 

 the same length, the inner margin being almost straight. Trochanter almost 

 globular. 



Chelicerae — (Fig. E, G). Spinnerets long and almost conical in shape, 

 apparently unbranched, although owing to the method of mounting such 

 branching may have been lost. There appears to be a slight constriction or 

 suture near the base. In the type there may be seen running up the movable 

 finger mto the spinneret two and possibly three slender ducts, which are pre- 

 sumably from the silk glands. At the base of, and slightly anterior to, each 

 spinneret is an alveolus from which a seta originally arose but which is lost in 

 the type. The serrula consists of about thirty teeth of which the proximal are 

 longest. Fixed finger with nine small teeth exclusive of the hard chitinized tip. 

 The "fixed finger serrula" is present but rather inconspicuous. On each side 

 of the base appears a prominent ''stoma." (See remarks). 



Cephalothorax — Rather small, sub-triangular, cephalic border emarginate 

 with an indistinct suture or furrow behind the eyes, which are very bright and 

 prominent. Carapace very finely granulate, sparsely covered with minute hairs 

 and bearing a number of small stomata. On either side of the labium is an 

 irregular group of five good sized bristles or setae. The legs are each composed 

 of seven segments ; coxa, first and second trochanters, femur, tibia, metatarsus 

 and tarsus. All segments of the legs except the last three are in each case 

 sparingly clothed with fine hairs, but on the last three segments occur numerous 

 stout setae which are more or less regularly arranged. The claws are long and 

 simple and the empodium prominent. (Fig. B.) 



Abdomen — Large and evenly rounded. The scutae, with the exception of 

 the first and last are widely divided by a longitudinal median strip and broad 

 intersegmental areas. The last scuta is not only entire but is continuous with 

 the last ventral scuta as well. All these plates are more or less unevenly 

 chitinized and it is due to this fact that their characteristic patterning appears; 

 the areas of heavier chitinization appearing darker than the rest. (See dotted 

 areas of he:;vier chitinization in fig. A.) The posterior border of each scuta 

 bears a row of from three to eight short, simple setae and anterior to, and roughly 

 parallel with them occurs a row of from three to eight small stomata. The 

 ventral plates are generally smaller and more weakly chitinized than the dorsal 

 ones and the patterning is also different. Only the last seven pairs are visible, 

 the others being indicated by the rows of setae and the very prominent spiracles. 

 Plainly visible at the anterior distal corner of each ventral scuta except the last 

 are the vestigial stigmata. Just inside the anal opening are two pair of small 

 setae. 



Skin — (Fig. D). The structure of the skin forming the scutae is very 

 distinct and gives a very characteristic reticulated appearance. 



Operculum — (Fig. C.). Just anterior to the genital slit are three rows of 

 short simple setae which probably indicate the first two abdominal segments. 

 Posterior to the opening is a very long narrow chitinized area, then two separate 

 rows of setae and finally the first of the visible plates. The most distinctive 



