658 Pomona College Journal op Entomology 



ventral plate. Anal legs clawless, the claw in each being replaced by a small 

 additional article. 



One species occurs, somewhat doubtfully, within the state. 



Arenophilus bipunticeps Wood 



Cephalic plate truncate caudad and extending over the anterior border of 

 basal plate; bearing two sharply impressed sulci on caudal portion which diverge 

 but little cephalad. Claws of prehensorial feet when closed extending much 

 beyond anterior margin of head, the teeth of joints usually small. First spiracle 

 vertically elliptic, larger than the second; the immediately following spiracles 

 may also be similar in shape, those of more caudal segments becoming gradually 

 circular. V'entral pores in a large area in front of caudal margin which is truncate 

 cephalad and extended angularly at middle caudad. Coxoplenrse typically with 

 two large porigcrous ])its at each lateral edge of ventral plate ; in some specimens 

 the more caudal pit on each side may be broken into two distinct but contiguous 

 pits. 



A large species which has a large head from which the body is narrowed 

 caudad. 



Two specimens in a vial containing no locality label but among others from 

 Claremont and undoubtedly collected at that place. In the eastern section of the 

 United States this is one of the commonest and most widespread members of 

 the suborder. 



Subfamih- Linoteniinae 



Of the two American genera at present known as belonging to this sub- 

 family, one, Linotenia, occurs in California. 



The labrum has the middle piece relatively very large and toothed along the 

 margin directed cephalad whereas the side pieces are small, in part overlapped 

 by the median, and with edges wliolly smooth or free from teeth or pectinae. The 

 palpi of the first maxillie lack lappets. Tlie dorsal plates are smooth, not bisulcate 

 as in the preceding subfamily. Ventral pores in a well marked transverse band 

 in front of caudal margin, the band on more caudal segments usually divided at 

 median line. 



Genus Linotenia C. Koch 



This is a compact and clearly delimited genus. The species all have the 

 body decidedly narrowed cephalad with the head small and characteristically 

 narrowed anteriorly. The frontal suture is distinct. Antenna filiform. The 

 claws of the preliensorial feet, which when closed, do not extend beyond the front 

 margin of head and usually fall considerably short of it, bear at base within each 

 a conspicuously large tooth. The coxostcrnum, or prosternum, is without lateral 

 chitinous lines. The coxoplcur» bear several to many small pores. The anal 

 legs terminate in claws. 



Most species of tlie genus in life are briglit reddish in whole or in part; 

 but in alcohol tlie red |)igment fades leaving the color mostly some shade of 

 brown. 



