chamberlin: new spiders of the family avic'ulariidae. 33 



CTENIZINAE. 

 Pachylomerus tuobitus ^ sp. nov. 

 Plate 1, fig. 6-8. 



Tyyc. — M. C. Z. 7. cf. Illinois. Peabody acad. sci. Salem. 



Carapace and chelicerae very dark, black or nearly so. Sternum 

 and coxae of legs beneath dark brown or chocolate colored. Legs 

 dorsally almost black, ventrally lighter, more brownish, especially 

 the metatarsi and tarsi as also the tibia of palpus. 



Fovea thoracica less than one third the width of the carapace; a 

 single fine impressed line extending from the fovea to the eye-area. 

 Entire surface of carapace densely finely roughened with impressed 

 lines and dots, finely coriaceous. 



Anterior row of eyes procurved; median eyes subequal to the lateral, 

 or a little smaller and rather closer to each other than to these. Poste- 

 rior row of eyes a little recurved; median eyes smaller than the lateral, 

 much closer to the latter than to the anterior median. 



Labium bearing on the anterior border 11 cuspules of which 6 are 

 arranged in a distal transverse row in two groups of three each, these 

 being separated by a wide space at middle; the other 5 are arranged 

 somewhat in the form of a V with the apex toward the median inter- 

 val in the first row. 



Metatarsus and tarsus of leg I with a band of spinules along meso- 

 lateral surface on each side of scopula; a similar band in correspond- 

 ing position on the tibia with a few also on the ventral surface; a 

 complete row on the tibia in the type consists of 11 or 12 spinules. 



Tibia of male palpus thickest dorsoventrally at middle of length from 

 where it narrows distad and proximad, not at all swollen at base; a 

 fringe of long hairs over its ventral surface. Bulb of the palpal organ 

 globose. Stylus long and distally very slender, distad of the middle 

 evenly curving. 



Male (type). Total length, 20 mm. 



Cephalothorax : length, 8.2 mm.; width the same, or scarcely 

 narrower. 



1 Gosiute luobil, black. 



