Pomona Coi.i.KCiK .Im iinm. ok F.NToMoi.ofiv 665 



funiis Soniphilus llianilicrlin 



'I'liis fjcniis as at prt-sfiit known nnhrncfs two spcfirs, the one (Icsfrihcd 

 IhIow and S. rmliiiis Clianilu'rlin, the typi' of tin- gi-nus, n closely related sprcics 

 from Iowa wliidi is but 1 .S mm. lonjj. In this frcniis the prclicnsorinl feet an; 

 short, not attainin); the front margin of the head, and its joints arc nil unarmed 

 within. The first mnxilhc have hut one la))pet on each side, this heiiif; an out- 

 growth from the proximal jirtide of the paijius. Tile last ventral j)late is very 

 wide. Coxopliiir.-il pores few .ind sin.ill. mostiv eo\ered liv the edge of the ventral 

 plate. 



Soniphilus secundus sjv imv, 



(hitinous lines of prostirnnm not wholly complete. C'Inws of prehensorinl 

 feet with a minute or obsolete denticle within, not attainin); front margin of head. 

 Ci-plialic plate widest a little in front of caudal margin, narrowing moderately 

 forward. Frontal suture not present. Basal plate very wide. I'ri'basal pl.'ite not 

 exposed. The labrum has two very stout conical teeth at middle, the adjacent 

 processes being abruptly less strongly chitini/ed and longer like those of lateral 

 fringes. S|)iraeles all circular, the first larger than the second. First legs a 

 little shorter and more slender than the second. Last ventral plate very wide, 

 narrowed caud.-uL Two moderat<' sized pits on each coxopleura covered, or mostly 

 so, by edge of l:ist ventral plate. Anal legs in female slender, longer than the 

 penult, ending in a well developed claw. The body is attenuated strongly caudad 

 and less strongly, though considerably, cephalad. Fulvous; head light ri'ddish 

 yellow; antentm- yellow. Length ad 18 nun. Pairs of legs, in female forty-three, 

 male forty-one. 



Localities. — .S.iusalito (author, .\pril, li)ll), P.-ieific drove (author, .Iidy, 



LOoy). 



.\s indicJitid previously, this species is very close to the ty]>e species S. rmhiiif 

 found in Iowa and Wisconsin; but it differs clearly in the character of the 

 armature of the labrum. in the shape of the cephalic plate, in the larger basal 

 plate and in details of the last ventral plate and the coxopleurip. The chitinous 

 lini's of the presternum arc also less strongly developed. 



Tabiphilus gen. iiov. 



This genus is in general structure most clearly allied with the preceding; but 

 it ditTers in having the edge not twisted ventrad at the middle, the teeth extending 

 caudad as in most genera and not having the middle two (piitc so strongly 

 differentiated from the others, and clearly in having two long membranous lappets 

 on each of the first maxilla, the distal lappet being clearly longer than the distal 

 article of the )>alpus. The one species known is larger and has a much larger 

 number of pairs of legs than any one in the two other genera of the family. 



Tabiphilus rex sp. nov. 

 Hody light ferruginous. .Mlcniiated cephalad and more decidedly caudad. 

 The ce))halic plate is truncate anteriorly and al.so posteriorly; the sides are 

 straight and parallel from the caudal angles forward to about the beginning of 



