1915] Ckapin — Early Siafe.^ of Slaphylinidce 159 



two-thirds as long as maxillary stipes, first joint twice the length of the palpigerous 

 stipes and nearly equal in width, with two seta;, one on interior margin, one-third 

 of distance from base to apex and the other on the exterior angle of the apex. 

 Second joint two-thirds length of first and two-thirds width, subcylindrical, un- 

 adorned. Third joint one-half length and width of second, cylindrical, slightly 

 acuminate, unadorned. Formula of maxilla: Stipes, .31 Palp, .21 Lobe, .07. 

 Metitum exerted. Stipites of labial palpi concrete, taken together somewhat de- 

 pressed clavate, with a shallow indentation on either side of apex, densely clothed 

 with minute setse. Ligula present, minute, conical. Labial palpi two jointed with 

 terminal appendix. First joint cylindrical, slightly longer than palpigerous stipes, 

 three times longer than wide, unadorned. Second joint cylindrical, slightly fusi- 

 form, same length as first, slightly narrower. Terminal appendix tapering cylin- 

 drical, two-thirds as long as second joint, unadorned. Formula of labial palp: 

 .06 .06 (.04). Thorax composed of three well defined segments. First segment 

 rectangular, nine-tenths as wide as long, tapering posteriorly, slightly chitinous. 

 Numerous seta; arranged as follows: seven large, on or near lateral margins (one 

 at middle, four at anterior angle and two midway between middle and posterior 

 angle). Two on anterior margin, each half way between angle and midline. Two 

 similarly placed near posterior margin. Second segment rectangular, equal in 

 width to first and four-fifths as long. Not chitinous. Numerous setae as follows: 

 Five large, on or near lateral margins, somewhat as in first. One seta near each 

 anterior angle. Other minute setse present. Third segment: same size as second. 

 One large seta on margin near anterior angle. Other minute setse. Abdomen com- 

 posed of nine segments, the last bearing a pair of cerci and anal tube. Segments 

 progress in width to the fourth, then taper to the end. Numerous setae on each 

 segment. Anal cerci two jointed, arising from dorsal, posterior margin of ninth 

 segment. First joint cylindrical, five times as long as broad, with six setae ar- 

 ranged as in Plate IL Figure 2. Second joint cylindrical, same proportion as first, 

 with two setae at tip. A minute terminal appendix present. Legs. First pair. 

 Femur stout with a few setae on margins. Tibia cylindrical, same length as femur, 

 armed with a row of seven stout spines on posterior margin. Tarsus cylindrical, 

 armed with stout spines, eight on anterior and seven on posterior margin. Ter- 

 minates in a single claw. Second and third pairs, similar to first. Comparative 

 lengths of legs: 



1st. 2d. 3d. 



Femur 25 25 27 



Tibia 24 26 28 



Tarsus 21 20 22 



Pupa of Xantholinus cephalus. 



Form coarctate, total length three and one-third times greatest width, greatest 

 width one-third length of pupa from anterior end. Length, 4.8 mm. Color chitin 

 colored throughout. Antennae directed posteriorly from insertion and in living 

 pupa, lie concealed under sides of head. Elytra and wings small, wrapped closely 

 around body so that they are hardly visible from dorsal surface. Stigmata of thorax 

 concealed, those of abdomen visible from dorsal side, peritremes protruded, slightly 



