Goleopterological Notices, VI. 765 



from constrictus not onl}' in this respect, but in the entire struc- 

 tural detail of the thoracic pi'ocess and crest, and in the very long 

 bristling setae of the elytra. 



In the species of Notoxus the modifications at the thoracic apex 

 are quite complex, and seem designed in part to prevent a too 

 great lateral motion of the head, which would thus be deprived 

 of the protection of the thoracic process. There is, among these 

 modifications, a small oval subdepressed area at each side just 

 behind the apical margin, which has the bottom convex and very 

 densely sculptured and pubescent ; this is especially developed in 

 constrictus, but is ver}^ small in the present species ; it is perhaps 

 connected in some waj- with a lateral enlargement of the neck 

 within the prothorax. 



'%, aiistiiiianiis.— SomeAvhat stout, pale rnfo-testaceons throughout, 

 the legs more ochreous; elytra with two feeble scutellar spots and a transverse 

 fascia behind the middle of blackish, the latter rather narrow and flexed toward 

 the suture to the middle; lateral spots wholly obsolete. Head not perceptibly 

 narrower than the prothorax, minutely, closely punctate and pubescent, reticu- 

 late and dull, the eyes large, much longer than the tempora; antenna stout, 

 two-fifths as long as the body, gradually and distinctly incrassate, the tenth 

 joint obconical, much longer than wide. Prothorax small, globular, minutely 

 and moderately closely punctate, polished, the vestiture fine, decumbent, not 

 concealing the surface, more evident along the median line; basal line very 

 wide laterally, broadly subinterrupted at the middle; horn well developed, 

 broad, rather finely dentellate, only very slightly wider in the female, not dis- 

 tinctly narrowed at base, the crest strongly elevated and defined throughout 

 by an acute entire border. Elytra not quite twice as long as wide, at posterior 

 third sensibly dilated and nearly twice as wide as the prothorax, broadly, 

 evenly rounded behind in both sexes; disk scarcely at all impressed at base, 

 finely, deeply, closely punctate and dull, the vestiture somewhat coarse, de- 

 cumbent, cinereous, dense and evenly distributed, the erect setit abundant, 

 but not very coarse and decidedly short. Under surface finely, very densely 

 pubescent, the abdominal segments more coarsely so along the apices. Length 

 2.7-3.5 mm.; width 1.0-1.25 mm. 



Texas (Austin). 



The male diflfers scarcely at all from the female. Austinianus 

 is one of the allies of vionodon, and differs in its shorter, finer, 

 denser and more even vestiture, narrower posterior fascia, without 

 a subapical black cloud, much larger eyes, polished surface of the 

 pronotum, not concealed by the vestiture, and in other features 

 constituting a general facies. It is represented by a large and 

 homogeneous series. 



