666 Pomona College Journal of Entomology 



the anterior third where they roiiund in mesad to the anterior margin; longer than 

 wide in ratio 17:15. Frontal suture not present. Antennae three times as long 

 as the cephalic plate; proximal article wide, nearly touching its fellow; ultimate 

 article equalling in length the two preceding taken together. Prebasal plate very 

 slightly exposed. Basal plate three and eight-tenths times wider than the median 

 length of the exposed portion. Claws of prehensorial feet when closed not 

 attaining front margin of head; joints unarmed. Chitinous lines of prosternum 

 strongly developed; prosternum much wider than long (about 4:3). Ventral 

 pores few, in a transverse band in front of caudal margin of sternite. Legs of 

 first pair a little shorter and more slender than those of the second, the succeeding 

 few pairs gradually a little longer and thicker; anterior pairs clearly more robust 

 than the posterior. First spiracle obliquely elliptic, larger than the second which 

 with all the succeeding ones is circular. The last ventral plate is very wide with 

 its sides convex, the caudal margin subtruncate. Coxopleural pores mostly 

 covered, one or two only being partly exposed. Anal legs much stouter and 

 longer than the penult. Pairs of legs, seventy-five. Length about 30 mm. 



The type specimen was taken at Claremont by Prof. Baker and is the only 

 specimen of the species seen. 



Family Schendylidas 



In this family the antennae are thin and filiform. The labrum is composed 

 of a single piece, the free edge of which is concave and dentate. Mandible with 

 one dentate lamella, which may be divided into three parts, and one pectinate 

 lamella. Suprascutella never present. The ventral pores when present, as they 

 are in all Californian forms, are condensed in a circular or elliptic area. 



Pectiniunguis is the only genus now known to occur in California ; but 

 Schendyla is likely to occur. These two genera may be separated as follows: 



Key to Genera 

 a. Claw of second maxilla excavated and pectinate; dental lamina tripartite; 

 coxosterna of first and second maxillae grown together. 



Genus Pectiniunguis Bollman 



aa. Claw of second maxilla not excavated on one side and pectinate ; dental 



lamina of mandible entire ; coxosterna of first and second maxillse not 



grown together. Genus Schendyla Bergsoe and Meinert 



Genus Pectiniunguis Bollman 



Labrum entire, deeply incurved, mesally dentate. Mandible with dentate 

 plate in three divisions. Coxosterna of first and second maxillae fused together. 

 Claw of pallus of second maxillae concave on mesal side and finely pectinate along 

 the ventral pores in a small circular field in front of caudal margin of sternites. 

 Last ventral plate wide, each coxopleura with two porigerous pits at or beneath 

 edge of ventral plate. Anal legs six jointed, with or without claws. 



Key to Species 

 a. Anal legs without claws. P. americanus Bollman 



aa. Anal legs with claws. 



