594 FAMILY IV. SCOLYTID.S:. 



II. TRISCHIDIAS Hopkins, 1915-a. 



Funicle 3-jointed, joint 3 narrow; club without sutural septa, 

 but with three slightly curved septa on anterior face and two on 

 posterior face. 



916 ( -). TRISCHIDIAS GEORGIA Hopkins, 1915-a, 12. 



Stout, brown. Pronotum with rugose area red and with two short, 

 closely placed marginal teeth. Front convex, opaque, with small median 

 impression. Elytra shining toward base, the declivity oblique, opaque; 

 strial punctures distinct from base to declivity, obscure on declivity. 

 Length 1.1 mm. 



Brunswick. Georgia, March 3. (Hu'b'bard & Nr//Hv/r~.) 

 III. HYI-OTIIKXEMTS Westwood, 1X34. (Or., "beneath"H-"wood.") 



? "lub oval, with three sutures on anterior and one or tAvo on 

 posterior face, suture 1 with a small septum; eyes elliptical, 

 einarginate. The males in this genus are rare, much smaller than 

 the females, and may have but three funicular joints, or the 

 rourth is obscure. The species mine under bark of small dead 

 branches, in pith and wood of dead twigs, vines and in other simi- 

 lar small objects for which their size is suitable. The genus is rep- 

 resented by many species, not here included, from the West In- 

 dies and our southwestern stales, extending even to California. 



SYNOPSIS OF EASTERN SPECIES OF HYPOTHENEM IS. 



. Pronotum with apical margin produced and armed with a single 



spine. 918. MILES. 



aa. Pronotum with apical margin slightly produced or broadly rounded 



and armed with several small marginal teeth. 



&. Body short, stout; pronotum with apical margin slightly produced. 

 c. Pronotum with rugose area brown. 



(I. Front without median longitudinal impression. 920. ATOMUS. 

 del. Front with distinct median longitudinal impression. 



921. IMPKESSIFROXS. 



re. Pronotum with rugose area red. 



e. Front with median line and posterior median punctures. 



f. The two middle pronotal front marginal teeth more promi- 

 nent. 922. MARYLAXDICJE. 



ff. Margins but faintly produced. 923. ROBINI^S. 



ee. Front with distinct short impressed line, without punctures. 



924. TOXICODEXDRI. 



6&. Body elongate, slender to moderately stout; pronotum with apical 



margin broadly rounded. 

 g. Body elongate. 



7). Elytra light to dark brown; pronotum uniform light to dark 

 brown, never uniformly reddish, though the rugose area is 

 sometimes red. 



