NORTH AMERICAN COLEOPTERA. 41 



in tlie male : seta less stout. Beneath sparsely covered with dirty gray scales; 

 coarsely punctate, except last three ventral segments, which are densely and 

 finely punctate. Legs stout, femora strongly clavate, with a conspicuous ring of 

 white scales near the middle; tihife stout, feebly unguiculated ; some pale scales 

 near the extremity ; tarsi scarcely dilated ; last joint moderate, pubescent be- 

 neath ; anterior ones very little wider than middle and posterior. Length, % 

 4 mm. ; .16 inch ; ? 4..5-5 mm. ; .18-.20 inch. Plate I, figs. 8, 9. 



It is with pleasure that I dedicate this very interesting species to 

 niv learned friend, Dr. Horn, to whom I am indebted for substantial 

 additions to my cabinet, as well as kind advice in the preparation 

 of this paper. 



Hub. — Georgia, Florida. Two males and two females in Dr. 

 Horn's collection and a 9 ("0 i'l Dr. Hamilton's 



M. setiger u. sp. — Male; very similar in form and appearance to Hornii. 

 from which it differs as follows; smaller size — beak stouter, not longer than 

 thorax, distinctly tricarinate; thorax transverse, more than one-half wider than 

 long, sides broadly rounded, not constricted at tip ; disc not channeled, obscurely 

 impressed in front of scutellum and behind anterior margin. Elytra same form 

 as in the preceding species, but setse much more sleTider, scarcely conspicuous. 

 Length 3 mm. ; .12 inch. Plate I. fig. 10. 



A specimen of what I consider the 9 of Hornii in the same col- 

 lection, is a trifle smaller and has the elytral setae more slender, as in 

 Dr. Horn's specimen, agreeing, however, in all particulars with the 

 latter ; this may possibly be the 9 of the present species. The 

 scarcity of specimens does not permit me to decide this point. 



Hub. — Florida. A unique specimen in Dr. Hamilton's collection 

 is before me. 



DELUMBIS Group. 



The species belonging to this and the following groups are at once 

 I'ecognized by the rostrum becoming stouter and shorter, and always 

 di.stinctly carinate above. They alone constitute the genus INIacrops 

 sensu Kirby. 



In the present group the posterior tibise of the males are fi"inged 

 with long, flying hairs along the inner margin ; the thonix coarsely 

 sculptured. 



In this and the following group the antennal grooves expand to- 

 ward their distal extremity and impinge against the upper part of 

 the eyes ; their superior margin being directed toward the ui)per 

 extremity of the eye runs almost parallel with the upper surface of 

 the beak, the latter being always separated from the head by a dis- 

 tinct, transverse furrow. 



TEANS. AM. ENT. SOC. XVI. (6) FKBKUARY, 1889. 



