no. 3632 CARTWRIGHTIA — CARTWRIGHT 5 



Pronotum quadrate, anteriorly with narrow membranous edge, 

 slightly wider anteriorly, lateral margins shallowly doubly sinuate, 

 narrowly explanate, angles obtusely rounded, base angulate at mid- 

 line; surface with five depressed areas, large area on each side of 

 median ridge anteriorly, median, longitudinal, wide area over basal 

 half, and depressed area with long, deep, sharply incised, sinuate line 

 from anterior angles diagonally back to basal fourth (pi. 2) ; two an- 

 terior depressed areas bordered anteriorly by wide rounded edge, on 

 each side and in middle by rather narrow carinae, surface with nu- 

 merous deep, coarse punctures running together slightly posteriorly; mid- 

 dle anterior carina divided like inverted tuning fork to enclose median 

 basal area, surface of which with few deep moderate punctures toward 

 sides; diagonal lateral depressions also with few similar punctures as 

 well as deep incised lines; latter areas open to anterior depressions 

 without intervening ridge; surface generally with indistinct very fine 

 punctures. 



Elytral length 2.0 mm, width 1.25 mm, with sutural and four high, 

 sharply carinate, argillaceous, discal costae on each elytron and flat 

 feebly shining minutely alutaceous intervals in between, intervals 

 bordered on each side by row of very moderate punctures separated 

 by three or four diameters except over posterior fourth, where they 

 disappear and leave a very shiny smooth area; elytral costae with 

 very fine smooth midline under moderate magnification, straight and 

 parallel except at posterior ends, where first enlarged into large 

 bulbous argillaceous mass and next three converge to mass, their 

 ends enlarged very slightly with argillaceous coating but remaining 

 very narrowly separated from large mass of first; diameter of enlarged 

 end of first about equal to width between sutural and second costa, 

 first well separated from elytral margin and covered with fine setigerous 

 punctures separated by one to two diameters, setae fine, short, and 

 inconspicuous. 



Entire underside covered by thin argillaceous coating with alu- 

 taceous surface sculpture masking surface features. Presternum with 

 large wide triangular posterior intercoxal piece. Mesosternum shallowly 

 concave with thin margin expanding to partly cover edge of middle 

 coxae along anterior three-fifths; coxae diverging and almost meeting 

 elytra anteriorly; middle coxae separated by width of middle femur. 

 Metasternum with long, deep, moderately wide midline, disc with scat- 

 tered, shallow, indistinct, moderate setigerous punctures, generally 

 separated by two or more times their diameters, smooth and im- 

 punctate outward to sides; large, rough, depressed, triangular area in 

 front of posterior coxae. 



Abdominal segments alutaceous and thinly argillaceous, the last five 

 times wider than penultimate; other segments normal. Pygidium 



