12 MISCELLANEOUS FOBERT INSECTS. 



Head (figs. 1, 2) behind the eyes globuhir, about one-lialf maximum 

 width of prothorax, smooth, punctured, shghtly impressed between 

 the eyes and with a few scales on the front toward the margins of the 

 eyes. 



Beak slender, cylindrical, punctured, as long as prothorax or longer, 

 with sides parallel or slightly narrowed toward middle, or slighth' 

 broader toward base of mandibles. Antennal insertion at or toward 

 middle and the antennal groove beginning just in front of insertion 

 and extending almost parallel with ventral margin to near eyes. 



Antennse (fig. 1). — Scape shorter than funicle, which is 7-jointed; 

 first joint about as long as second and third together; second to seventh 

 of about equal length, but slightly increasing in width toward club; 

 first joint of club large, much longer on one side, and sparsely clothed 

 with short hairs and long bristles; other joints of club slightly more 

 flattened on one side, more densely clothed with fine hairs, and the 

 sutures as shown in figures 1 and 2. 



ANATOMICAL DETAILS OF THE ADULT." 

 THE HEAD. 



The generic characters and anatomical details of the external 

 skeleton and appendages of the head are shown in figures 1 and 2. 

 When compared with the head of a scolytid beetle (figs. 3, 4), it is 

 plain that the subordinal characters are common to both, but further 

 than this there are certain features which at once refer them not only 

 to different families but, in the writer's opinion, to different divisions 

 of at least superfamily rank. 



Mouth yarts. — The lahrum and clypeus are not represented, and the 

 epistoma is only represented externally by a smoother area faintly 

 defined by an obscure line and lateral bristles. As usual, the lateral 

 angles, or area, support the dorsal articulation of the mandibles. 

 The hypostoma also is obscurely defined externally, but is represented 

 by the thickened declivous anterior margin of the ventral wall of 

 the beak, by the sides of the submentum, and by a somewhat irregu- 

 lar apodeme, the anterior angles of which support the ventral articu- 

 lation of the mandibles, the middle supporting the maxillary cardo, 

 the inner anterior angle produced along the lateral area of the sub- 

 mentum, and the posterior angle ending ji.st beneath the large 

 hypostomal puncture. Thus the hypostomal area is that part of the 

 ventral wall of the rostrum which lies anterior to the indistinct limit 

 of the pregula. The pleurostoma is represented by the convex area 

 surrounding the large mandibular scrobe. The solid submentum, or 

 "gular peduncle" of authors, is evidently homologous with the bifid 



« For anatomical nomenclature, see Technical Series 17, Part I, Bureau of Ento- 

 mology, U. S. Dept. of Agriculture, 1909. 



