chamberlin: the arachnida, 211 



AuxiMUS PRODUCTUS, sp. nov. 

 Plate 8, fig. 5-7. 



Carapace dusky brown or fuscous. Caelicerae similarly dusky 

 over a more reddish or chestnut background. Legs testaceous; 

 the tibiae, tarsi, and metatarsi of legs I and II dusky, almost black or 

 tibia with an apical and a broader subbasal dark annulus indistinctly 

 set off; tibiae of legs III and IV with apical and subbasal dusky annu- 

 lus distinct and metatarsus of these legs with an apical and a broader, 

 less distinctly limited subbasal dark band. Patellae dusky. Femora 

 without rings or distinct marks, usually dusky beneath proximally. 

 Tibia and tarsus of palpus dusky or almost black like the distal articles 

 of anterior legs. Sternum dusky brown. Labium and endites darker 

 than sternum, pale across tips. Abdomen above with background 

 of greyish yellow of slight olivaceous tinge; at base above with a 

 black median sagittate stripe the acute apex of which is at middle; 

 this mark is followed caudad by a series of four, successively smaller 

 and smaller chevron-shaped black lines the angle of the first of which 

 is at the point of the sagittate mark; chevron marks with ends on 

 each side united by a longitudinal black line. Dorsum elsewhere with 

 small black, in part angular, dots, these more numerous on the sides 

 where they are confluent with enclosed areas dusky and entire surface 

 thus appearing blackish. A broad median band along venter immacu- 

 late greyish yellow of slight olivaceous cast like background of dorsum. 



Posterior row of eyes considerably procurved, a line through middles 

 of median eyes being nearly tangent to caudal edges of laterals; 

 median eyes clearly less than twice their diameter apart (11:7) and 

 nearly the same distance from the laterals; smaller than the laterals 

 (7:9). Anterior row of eyes with line of apices as seen from above 

 very slightly procurved; viewed from in front the row is nearly 

 straight, the centres of the laterals being slightly lower; median eyes 

 with diameter half as great as that of laterals, four fifths their diameter 

 apart, nearly same distance or slightly farther from laterals. Ante- 

 rior laterals equal to posterior laterals from which they are separated 

 by a distance not more than equalling half the radius. 



Labium about two thirds as broad at base as long; narrowed distad; 

 apically truncate. 



Sternum longer than wide, the length inclusive of caudal process 

 being to width as 9 : 6.5 and the length only to level of anterior proximal 

 corner of coxa IV being as 7:6.5. 



