1-2 



rsrcHE. 



[January 1S94. 



almost flat, gradually widening plate, the tip 

 rounded, with a more dense central rib and 

 some side ribs connected bv a membrane. 

 Body short, one half longer than wide. Eyes 

 but partially seen from above. Tarsi with 

 five to seven joints. The palpi not half so 

 long as the width of body. The sternum is 

 united to the venter. 



Ortholasma rugosa, n. sp. Length, 3.6 

 mm. ; width, 3 mm. ; femur II, 3 ram. -,fen)ur 

 I, 1.6 mm. Color black, young specimens 

 brownish, the projection of the eye tubercle 

 brown; legs pale toward the tips. The 

 entire dorsal shield is roughened by the 

 presence of ridges, somewhat regularly but 

 complexly arranged ; where the ridges inter, 

 sect they form tubercles, which in young 

 specimens are furnished with short clubs or 

 spines; the arrangement of the ridges is 

 more easily seen in young than in adult 

 specimens. The posterior margin of the 

 dorsal shield is furnished with a row of 

 spines, those near the middle being the 

 largest. The portion of the abdomen below 

 the end of the dorsal shield is furnished with 

 rows of tubercles. The venter and coxae 

 have numerous rounded tubercles or large 

 granules, more prominent in young speci- 

 mens; the spiracles are more distinct in 

 young than old specimens. The trochanters 

 are roughened with tubercles, the other 

 joints of the legs smoother and with short 

 hairs; second pair of legs longest, fourth 

 next; tibia II almost as long as femur II. 

 Palpi furnished with short hairs, fifth joint 

 about one-half as long as the fourth. 

 Southern California. 



Dendrol.\sm.4 gen. nov. 



Cephalothorax with a club at each side on 

 the anterior margin. Eye tubercle projecting 

 forward in the form of a central support, with 

 lateral branches somewhat connected at the 

 tips, the whole forming an oval figure. Eyes 

 distinct from above. In this as well as 

 Ortholasma the eves are situated at the base 



of the tubercle, and not carried forward on 

 the projection as in some European forms. 

 The form of the body is like Ortholasma: the 

 sternum is united to the venter; leg II is 

 proportionately longer than in Ortholasma 

 and there are eight or ten joints in the tarsus 

 II : tarsus I has but four joints. 



Dendrolasma mirabilis n. sp. Length, 3 

 mm.: width. 2.1 mm.; femur II. 3 mm.; 

 femur I. 1.5 mm. Color brown or- black, 

 venter paler; projection of eye tubercle and 

 the club at each side whitish, legs paler 

 toward the tips. Suture between cephalo- 

 thorax and abdomen and one at base of 

 abdomen distinct. Sides and hind margin 

 of cephalothorax with a row of tubercles 

 more or less connected. A square just 

 behind the eye tubercle of similar tubercles. 

 The dorsum of the abdomen has many series 

 of these tubercles, regularly but very com- 

 plexly arranged. There are five pairs of 

 larger tubercles on the dorsum, each bearing 

 small clubs or spines; the anterior pairs are 

 closer together than the posterior pairs. The 

 hind margin of the dorsal shield is furnished 

 with a series of clubs having lateral projec- 

 tions, those each side of the middle being 

 the largest. The segments of the abdomen 

 below the end of the dorsal shield are some- 

 what roughened with tubercles. The ventral 

 segments and coxae have many rounded 

 granules. The second joint of the mandibles 

 has a projection above. The trochanters are 

 very rough ; the tips of the anterior coxae 

 have partial circles of connected tubercles ; on 

 the second coxae one of these tubercles is 

 greatly enlarged and swollen at the tip ; and 

 on the fourth there is a straight row of sim- 

 ilar tubercles along the outer side. The legs 

 are quite long, the second longest, and the 

 fourth next; they are but little roughened 

 and with short hairs. In one specimen one 

 of the clubs on the anterior margin is cleft at 

 the tip. The peculiar tubercles on the bodv 

 are quite similar to those found in Nemastoma 

 mod est a. 



Washington State (Trevor Kincaid). 



