284 PROCEEDINGS OF THE NATIONAL MUSEUM vol. no 



equal to width of frons; of female inserted at basal fifth of beak at 

 distance from eye one-half greater than width of frons; first segment 

 equal to next three, second segment equals next two, club 0.21 by 0.08 

 mm. Eyes prominent; frons slightly wider than dorsal tip of beak, 

 with a shallow linear median sulcus and two lateral rows of fine 

 punctures. Prothorax at base one-fourth wider than long, middle 

 narrower than base, apex 0.7 as wide as base; sides beyond basal 

 lateral expansion slightly, roundly expanding to middle, rounding to 

 constricted apex; in profile doi-sal surface slightkf arcuate; punctation 

 0.03 mm. in diameter, moderately deep, interspaces generallj'" less than 

 the diameter of punctures, there is a narrow, nearly impunctate 

 median area; basal fovea moderateh^ shallow, rounded. Elytra at 

 humeri one-third wider than prothorax at base, 2.5 times as long as 

 prothorax, length to width as 10 : 7.5; intervals twice as wide as striae, 

 somewhat convex, with one row of minute punctures bearing very fine 

 scales; striae moderately deep, fine. Scutellum triangular, 0.06 b}^ 

 0.06 mm., with, very slightly median furrow. Front femora 3.3 times 

 as long as wide. Claws with acute basal tooth. 



Special male characters: Tibiae 2 and 3 armed with moderately 

 long, nearl}^ simple mucrones, femora 2 and 3 incrassate, first segment 

 of tarsus 1 clothed beneath with moderateh' long setae, fifth ventral 

 segment modified as follows: raised and convex transversely at base; 

 in median third with brush of dense, very fine long cilia; lateral apical 

 angles produced into a pah' of triangular processes projecting poste- 

 riorly and downward slightly beyond elytral tips, processes not visible 

 in dorsal view. 



Types: Holotype male (CAS) from village on Maria Madre Island, 

 Tres Marias Islands, Mexico, May 15, 1925, H. H. Keifer. Allotype 

 female (CAS), same data as holotype. Female paratype (DGK) from 

 Tapanatepec, Oaxaca, Mexico, Jan. 22, 1953, D. G. Kissinger. 



Remarks: The extraordinary characters of the male will readily 

 distinguish this species. The long beak of the female and its rather 

 broad head will help to recognize that sex. 



Apion {TricJiapion) adaetum, new species 



Figure 4,/i 



Description: Length, 1.87 mm.; width, 0.87 mm. 



Moderately robust. Black, legs piceous; pubescence of dorsal 

 surface fine, yellomsh, sparse, on sides of prothorax, mesothorax, and 

 metathorax white, much coarser and somewhat denser, a few whitish 

 scales at base of interval 3. Beak of male shorter than head and pro- 

 thorax combined, two-fifths longer than prothorax, moderately curved ; 

 in lateral view more or less attenuate to tip ; in dorsal view moderately 



