SUBGENUS TRICHAPION — ^KISSESTQER 269 



curved, in both sexes more strongly punctate, duller, and especially 

 in the male with punctures arranged in rows above antennal insertion. 

 Head shorter and wider, eyes (especiallj'' of male) differently rounded, 

 widest well behind middle ; the wide frons furcate, interspace between 

 middle and lateral stria moderately closely and extremely finely 

 punctured. Antennae are somewhat stouter, especially the club 

 noticeably larger. Prothorax same general shape but a little wider, 

 punctures more scattered and on disc and base distinctly sparser 

 than at foremargin (in oscillator punctures denser and less pro- 

 nounced); the smooth middle line is more distinct and the basal fovea 

 shallower than in oscillator. The intervals are nearly fiat, extremely 

 finely and sparsely punctured; scutellum is nearly twice as large, 

 elongate-triangular; unfurcate. Legs as in oscillator, male with four 

 hind tibiae mucronate with shorter, fine spine pointed more toward 

 inner angle. Body color slightly shining black, elytra with a dark 

 blue metallic luster. Pubescence of mesothorax and metathorax is 

 not denser than oscillator, that of elytra and prothorax somewhat 

 finer. 



Type locality: Managua, Nicaragua. 



Apion {Trichapion) grossuliim Fall 



Apion groasulum Fall, Trans. Amer. Ent. Soc, vol. 26, p. 141, 1898. 



Description: Length, 2.37 mm.; width, 1.67 mm. 



Robust. Black, antennae in part piceous; pubescence of dorsal 

 surface white, fine, very sparse, slightly coarser and more evident 

 laterally but not especially denser. Male beak slightly shorter than 

 head and prothorax, a little less than one-half longer than prothorax, 

 moderately, evenly curved especially on dorsal margin; in lateral 

 view stoutly parallel in basal third, attenuate to tip; in dorsal view 

 expanded laterally at antennal insertion, attenuate from antennal 

 insertion to near tip, tip slightly expanded; punctures rather coarse, 

 close, arranged in rows, tip smoother; sparsely pubescent in basal 

 two-thu'ds. Antennae inserted at basal fifth of beak at distance from 

 e5^e equal to width of frons; first segment equals next two, second 

 segment slightly longer than third. Eyes prominent; frons about 

 equal to dorsal tip of beak, with a median, moderately deep, narrow 

 sulcus and one lateral row of confluent punctures, appearing tri- 

 sulcate. Prothorax one-sixth wider than long at base, middle slightly 

 narrower than base, apex three-fourths as wide as base; sides beyond 

 basal lateral expansion slightly converging, rounded to constricted 

 apex, apex slightly flared out; punctation moderately deep, 0.04 mm. 

 in diameter, interspaces generally less than diameter of punctures; 

 basal fovea deep, short, nearly punctiform. Elytra at humeri one- 

 third wider than prothorax at base; 2.5 times as long as prothorax; 



