H. C. FALL. 135 



toward the tip, very finely sculptured and punctulate throngliout. First joint 

 of Hiitennse as long as the next two ( "J, ), or three ( 9 ). Front narrow, very little 

 wider than the tip of the heak. subdepressed, canali(uilate ; a narrow line of 

 whitish squamules alonj; the inner margins of the eyes, which are not prominent. 

 Prothorax about as long as wide, widest one-third from the base; sides arcuate 

 behind the well-marked apical constriction, sinuate before the base; surface 

 rather sparsely jjunctate, with an elongate basal fovea. Elytra not quite twice as 

 long as wide, suhparallel ( '^ ), a little wider behind the middle ( 9 ) ; humeri not 

 prominent; intervals somewhat variable, usually less than twice as wide as the 

 striiE, and feebly convex. Beneath sparsely or moderately punctate; the nieso 

 and metasternal side pieces conspicuously clothed with white squamiforni pu- 

 bescence. Legs slender; claws vs'ith a rather strong tooth. Length 1.9 2.1 mm.; 

 .075-.08r) inch. 



%. Sulural angles rounded; anterior coxfe bearing a conical tubercle at 

 summit; middle and hind tibite with a very small mucro. 



9. Suturalanglesobtu.se; anterior coxje scarcely modified ; tibiaj unarmed. 



ifo 6. —District of Columbia, North Carolina, Lower California, 

 Arizona. 



The last locality is represented by a male in the National Museum 

 collection, which differs from eastern examples only in the beak 

 being entirely polished beyond the in,sertion of the antennae. It is 

 v^ery well preserved, and the pubescence is a little more evident than 

 usual. The Lower California example is a female presenting no 

 variation worthy of note. 



The sides of the prothorax as well as the elytra are more parallel 

 in the male. The peculiar sexual character is unique. A species 

 of wide distribution, but as yet not common in collections. 



36. A. teuuirostriiiii Smith. — Moderately elongate, black, sometimes with 

 faint, cupro-feneous lustre; pubescence consisting of rather sparse squamiforni 

 hairs, which tend to become condensed on the third elytral interval. Beak as 

 long as the head and prothorax, often considerably longer ( 9 ), moderately or 

 feebly arcuate, slender, scarcely dilated, parallel, polished except toward the base, 

 sparsely punctulate. Antennge rather short, first joint scarcely equal to the two 

 following, second reaching the eye. Front with a few serially arranged punc- 

 tures at the sides, middle scarcely sulcate; eyes feebly convex, not at all promi- 

 nent. Prothorax as long or a little longer than wide ; base but little wider than 

 the apex, widest at or a little behind the middle ; sides arcuate, except for the 

 apical constriction; basal margin not expanded ; surface densely, coarsely punc- 

 tate, with an elongate, basal fovea. Elytra about one-half longer than wide ; 

 humeri moderate; sides feebly arcuate: striae deep; intervals narrow, convex, 

 shining. Beneath coarsely, deeply, rather closely punctate. Femora stout, first 

 three tarsal joints subequal, fourth as long as the two preceding together. Claws 

 acutely toothed. Length 1.8-2.4 mm.; .07.095 inch. (PI. IV, tig. 1). 



% . Sutural angles rounded ; all the tibige with a nearly simple mucro, which 

 projects almost at right angles to the tibia. 



9 . Sutural angles not rounded, sometimes slightly produced ; tibia unarmed. 



TRANS. AM. ENT. SOC. XXV. OCTOBER, 1898. 



