''"im"'] PROCEEDINGS OF THE NATIONAL MUSEUM. 389 



conic ; palpi broadly conic, rounded, with two processes, one of which is 

 large and attached to the exterior edge of the basal joint. 



Claw of maxillary palpus broad, spoon-shaped, the concave side 

 facing inward, margin fringed with a pectinate row of spines. 



Sternum of prehensorial feet without chitinous lines, anteriorly 

 medianly emarginate; claw unarmed at base. 



Scuta bisulcate. 



Spiracles long elliptic to nearly circular ; spiracle-bearing scutellum 

 of moderate size, considerably larger than the postscutellum and about 

 half as large as the elliptical prescutellum ; middle and interior scu- 

 tella and prescutella present. 



Ventral pores in suboval median areas. 



Pleural pores two on each side, large, unpigmented. 



Last ventral plate large, broad, its presternum large, undivided. 



Anal legs six-jointed, all the joints well developed, enlarged in 

 male, unarmed. 



Genital palpi of male two-jointed. 



Anal pores wanting. 



This genus differs from kSchendyla in the three dentate lamellae, the 

 coalesced labial and maxillary sterna, the large processes, the excavate 

 claw of the maxillary palpus, and the elliptical spiracles. 



On account of these and other points of difference this genus can not 

 possibly include Schendyla eximia Meinert, which Mr. Bollman placed 

 here, evidently not being aware that his genus possessed the above 

 characters. Acccording to Meinert's description, eximia differs from 

 Mcmorerm.5 in having the labrum free in the middle, the claw of the 

 maxillary palpus pectinate, and the anal legs five-jointed. This last 

 character is, by reason of its constancy in other genera, a most impor- 

 tant one. Meinert's diagram would make it appear that the labrum is 

 free along nearly its whole anterior margin. 



In his generic characterization o( Schendyla, Latzel gives the genital 

 palpi as simple or two-jointed, and those of S. neniorensis being two- 

 jointed, without recorded variation, we can only infer that in eximia 

 they are simple. If our iuformatiou and inferences are correct and 

 well drawn, eximia differs from nemorensis in at least three particulars 

 which are each greater than any corresponding diiierence known to 

 exist between the species of any genus of the family, and there is most 

 sufficient warrant for the elevation of Mr. Bollman's subgenus Nanno- 

 pus to generic rank. But without specimens we cannot give the ques- 

 tion a final discussion. 



Pectiiiiunguis Americanus Bollman. 

 Plate XXXIII, Figs. 1-5, and Plate xxxiv, Figs. 6-8. 



Body depressed, narrowed slightly anteriorly, moderately posteriorly ; 

 brownish-yellow, with a line of medianly divided dorsal dark spots, ex- 

 tending from the second to the penultimate segments, after the manner 

 of Geophilus cephalicus. 



