TAXOirOMIC STUDY OF MORDELLIDAE RAY 307 



broader than 4, broadest subapically; 11 one-half longer than 10 

 mesal edge, apex and corners rounded, broadest postmedially. Distal 

 segment of maxillary palpi enlarged, with form of a scalene triangle, 

 broad, lateral margin straight, other edge and corners rounded (fig. 

 16, i). Pronotum four-tenths broader than long (1.1 by 0.8 mm.), 

 sides and apex rounded, basal angles obtuse, base arcuate, midbasal 

 lobe short, distinctly truncate. Scutellum moderately large, trian- 

 gular, sides straight, apical angle rounded. Elyira two and three- 

 tenths times as long as broad (2.5 by 1.1 mm.), sides subparallel on 

 basal three-fourths, thence broadly rounded to apex, apices individu- 

 ally rounded. Intermediate tarsi longer than their tibiae; penulti- 

 mate segment of anterior and intermediate tarsi dilated, emarginate 

 at apex, bearing the distal segment on its ventral surface. Posterior 

 tibiae with three short, oblique ridges, each extending less than half- 

 way across outer surface; basitarsi with four, second segment with 

 two oblique ridges, each extending less than halfway across outer 

 surface. Tarsal claws with four teeth, all long, acute (fig. 18, I). 

 Outer spur of posterior tibiae twice length of inner one. Anal style 

 two and one-half times length of apical ventral segment (1.25 by 0.5 

 mm.), slender, attenuate to apex; last ventral segment three times 

 length of penultimate one. 



Type locality. — San Cristobal, Chiapas, Mexico. 



Type.— Mule, U.S.N.M. No. 52943. 



BeTnarks. — The type was taken at San Cristobal, Chiapas, Mexico, 

 July T, 1926, by sweeping, at 2,200 meters elevation (A, Dampf ) ; 

 a male paratype was taken at Cerro Ecatepec, Chiapas, Mexico, June 

 24, 1926, on shrubs, at 2,400 meters elevation (A. Dampf). 



MORDELLISTENA FLAVOCOLLARIS, new species 



FiGtJBE 18, m 



This species is most closely allied to sanguinicollis Champion (1891, 

 p. 320) and may be separated from the latter member of the genus by 

 the difference in the pattern of the elytral pubescence, the equality 

 in length between antennal segments 3 and 4, the broader distal seg- 

 ments of the same, the difference in the color of the ventral surface, 

 legs, and antennae, and the smaller number of comblike ridges on 

 the posterior tibiae. 



Length : 3.6 mm. ; including anal style, 4.7 mm. Form moderately 

 robust, sides attenuate, narrowing slightly but visibly from base of 

 elytra posteriorly, broadly rounded from apical fourth of elytra to 

 apex, apices individually rounded, broadest near base of pronotum. 

 Head, except clypeus, and elytra, piceous black ; pronotum castaneous, 

 with an indefinite dorsal cloud on posterior half of disk; antennae, 

 mouth parts, anterior legs, caudal margins of metasternum and 



