390 University of California Publications in Zoology [Vol. 19 



Head nearly 1.66 times longer than wide, being thus relatively 

 broader than in several allied species. Widest at level of submarginal 

 teeth or spurs, narrowing caudad, more abruptly so toward posterior 

 end, as usual, the posterior corners rounded. Moderately and sub- 

 uniformly punctate with coarse and more numerous finer punctae 

 (cf. pi. 26, fig. 1). 



Antennae rather long, gradually attenuated. Ultimate article twice 

 as long as thick, a little longer than the penult. 



Labral margins wholly without cilia. Lateral pieces considerably 

 overlapping the median, their free margins crenulate toward mesal 

 ends as shown in plate 26, figure 3. At anterior end of median 

 areolated stripe separating the non-areolated clypeal areas is a small 

 chitinous area and on each side of this and farther forward a it two 

 larger non-areolated areas. The small median area bears two short 

 seta, and each of the posterior lateral areas mentioned bears two, each 

 anterior bearing one (pi. 26, fig. 2). 



Mandibles each bearing nine lamellae, of which the ultimate is 

 modified, not being truly pectinate but bearing several fingers or 

 filaments at the distal end (pi. 26, fig. 6). The first lamella bears 

 seven stout teeth which are uniform or nearly so, and are stouter than 

 the teeth of the other lamellae (cf. pi. 26. fig. 5). The ordinary 

 lamellae present numerous long teeth which are of nearly uniform 

 length throughout, much as in insularis. A median lamella bears 

 twenty-three teeth, or nearly that number. 



Coxosternum of second pair of maxillae characterized by the trun- 

 cate posterior corners ; a median non-areolated region or band present, 

 but more or less broken by areolated cross-bands. Ectal angles of 

 coxae of first maxillae elevated or produced forward, acute (cf. pi. 26, 

 fig. 4). 



Free portion of presternum seven-eighths as long as wide. Anterior 

 margin armed with two distinct teeth, obtusely rounded. Length 

 of mesal side of exposed part of femuroid of prehensors is to outer 

 height as six to one. Femuroid armed with two teeth which are about 

 equal in height but the distal one is a little stouter and more blunt. 

 Succeeding two articles each with a small, nodule-like tooth. Claw 

 armed at base with a broad, low eminence (cf. pi. 26. fig. 7). 



First legs reduced and slender, about three-fifths as long as the 

 second legs. 



Impressions of anterior sternites furcate, the furcation subree- 

 tangular or but slightly obtuse. In going caudad the branches decrease 



