'^Vo'."'] PROCEEDINGS OF THE x\ATIONAL MUSEUM. 387 



Labrum entirely coalesced with froutal lamina; labral teeth 13-20. 



Labial palpi with a small transparent process on the basal joint. 



Claw of maxillary palpns simple. 



Prehensorial feet scarcely attaining the frontal margin ; sternum 

 l)roader than long (8:5), longer than coxa (5:3), moderately sinuate in 

 front, unarmed ; coxa unarmed or with an obtuse tooth ; claw, with a 

 small tooth at base. 



Scuta smooth, manifestly bisulcate; prescuta of moderate length, 

 the median longest. 



Spiracles small, round, smaller i)OSteriorly. 



Sterna elongate, the anterior trifoveolate, the posterior obsoletely 

 bisulcate. 



Pleuri3e of last segment but little enlarged, with two large pores on 

 each side ; last sternum large, concealing the pores, its sides converg- 

 ing posteriorly. 



Legs short and slender, the first pair scarcely shorter than the sec- 

 ond ; anal legs longer than the preceding pair, six-jointed, more strongly 

 hirsute, enlarged in both sexes, but especially in the males, unarmed 

 or with a very small and slender claw. 



Genital palpi of male two-jointed. 



Anal pores wanting. 



Pairs of feet 39-47 in European specimens; Algerian specimens are 

 Tecorded by Meinert with as high as fifty-five pairs; all the American 

 specimens which we have collected have forty-one pairs. 



Length, 25 milimetres and under. 



Habitat. — Clyde, ISTew York, December, 1889, one specimen ; Clyde, 

 New York, July 1890, five specimens ; Staten Island, New York, April, 

 1890, Dr. L. M. Underwood, three specimens. 



The specimen found in December was under a board ; those taken in 

 July were in the same location, but were six or eight inches under- 

 ground. The Staten Island specimens were in sandy soil among Hep- 

 aticse. 



The American specimens resemble, in every important particular, 

 Swedish specimens communicated by Stuxberg to Dr. Underwood. 



Meinert {op. cif., 56) says that the labial palpi are simple, and Latzel 

 {op. cit, 198) declares that they are without a trace of processes, but all 

 the specimens which we have examined, both European and American, 

 have a process attached to the exterior edge of the basal joint of the 

 palpus. It may be that the species varies in this regard, but we think 

 it more probable that the writers above cited have overlooked the 

 structure in question as it is very thin and transparent and usually lies 

 folded close upon the dorsal side of the palpus. We have therefore 

 modified both the generic and specific descriptions in accordance with 

 this view. According to Meinert's description the palpus of S. eximia 

 has a small process, and hence this character is common to both species 

 of the genus. 



