. Brigham Young University science bulletin. Biology -- Periodicals. 16 Brigham Younc University Science Bulletin nal apical sinuation, likewise, some specimens collected by Dr. Gressitt. This should be con- sidered when using the above key by Sir Guy Marshall. Platyaciis nigrocristatus Hllr. Heller, Verb. Naturf. Ver. Basel XLV, 1934, Fig. 11 Derm brownish, black, with dense white scales. Rostrum a little longer than head, paral- lel sides, carina distinct, scales dense with small black granules showing through, slight eleva- tion at declivity which is reddish-brown with sparse white set
. Brigham Young University science bulletin. Biology -- Periodicals. 16 Brigham Younc University Science Bulletin nal apical sinuation, likewise, some specimens collected by Dr. Gressitt. This should be con- sidered when using the above key by Sir Guy Marshall. Platyaciis nigrocristatus Hllr. Heller, Verb. Naturf. Ver. Basel XLV, 1934, Fig. 11 Derm brownish, black, with dense white scales. Rostrum a little longer than head, paral- lel sides, carina distinct, scales dense with small black granules showing through, slight eleva- tion at declivity which is reddish-brown with sparse white setae, scrobes small separated by a greater width than diameter of antennae scape. Antennae slightly bowed, gradually increasing in diameter to apex, densely covered with white scales and decumbent black setae, extending be- yond middle of prothorax, funicle a little longer than scape; segments 1-2-3 as long as segments 4-5-6-7 combined. Head densely covered with scales, a frontal carina which meets rostral ca- rina at curved sulcus; punctate extending to apex of head, granules interspersed among scales; eyes large, ovate, space between them less than diameter of eye. Prothorax mm. long, mm. in breadth, parallel sided in basal half, transver- sely convex on disc with granules and punctures, scales on septa around punctures (except in medial area which is sparsely covered); base and apex truncate, pleurae punctate and densely cov- ered with scales; a short white setae issuing from each puncture. Elytra, greatest width just before middle, shallow striae with punctures similar to those on prothorax; white scales on septa between punctures and on intervals; slightly convex at middle becoming concave between black elevations on fifth interval, shortly acumin- ate behind with apex produced dovmward. Legs brownish covered with white scales and setae; all femora with a large brown-colored tooth; venter and ventrites 3-4-5, with white decumbent setae, ventrite 4 of 9 sculptured sim
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