384 COLEOPTERA 



securiform. Mandibles nearly always entire and truncated at apex, 

 Labrum prominent. Head variable. Antennce gradually incrassated, 

 often widened and depressed from the sixth or seventh joint. Eyes 

 transversal, emarginate, seldom hidden by the thorax, often distant from 

 it. Ffothorax ordinarily a little narrower than the elytra at the base, 

 not at all, or only very slightly, emarginated. Scutellum more or less 

 large. Elytra feebly embracing the body ; their epipleural folds entire 

 behind. Front coxce globose ; tibial spurs absent ; ta7'si villose or brush- 

 like underneath, the four anterior sometimes widely dilated among the 

 males, the last joint usually very long. Intercoxal process of variable 

 width, lanceolate or acutely triangular. Metasternum very elongate, its 

 episterna parallel or gradually narrowed posteriorly. Mesosternum 

 horizontal, furcate, and receiving the intercoxal process. Mesothoracic 

 . epimera in general very large. Body winged. 



Artystona. 



Bates; Ann. Mag. Nat. Hist. 



Differs from TitcBna in the prosternum, less strongly and abruptly 

 elevated between the coxae, not distinctly concave in front of them, the 

 anterior horizontal portion longer ; the head consequently is less deeply 

 embedded in the prothorax, and does not repose on the front coxa?. 



Prothorax squarer, less convex, truncated at base and apex, more or 

 less finely punctured. Lateral reflexed margins of the elytra distinctly 

 terminating at the humeral angle ; the punctation of the surface of the 

 elytra is in rows of fine punctures, the intervals being convex, inter- 

 rupted, and forming, especially at apex, series of oblong tubercles. Legs 

 longer and (especially the tarsi) more slender. Body not pilose. 



Note. — As Titczna is not a New Zealand genus, there may be diffi- 

 culty in identifying this form by the above characters alone. I therefore 

 add a brief description of its outline and most obvious characteristics : — 

 Body oblong, transversely convex ; prothorax rather small, not much 

 larger than head, sub-quadrate, transverse, finely margined. Scutellum 

 triangular. Elytra wider and nearly three times longer than the pro- 

 thorax, widest behind the middle. Ante?i}ice about as long as head and 

 thorax, gradually incrassated. and inserted at the sides below, in front of 

 the eyes ; they are eleven-jointed, their basal joint partially concealed by 

 their orbits ; second short, obconical ; third longest ; joints four to 

 seven about equal to one another ; eighth and ninth nearly equal ; 

 tenth rather transverse ; eleventh rounded. Apical joint of maxillary 

 palpi securiform. Eyes convex, sub-reniform. Tarsi not much shorter 

 than tibiae, their terminal joint (in the anterior pairs) about as long as 

 the four basal ones, which are hispid underneath, and each becomes a 

 little shorter than its predecessor. 



684. A. erichsonii, White (TitcBfia); Voy. Er. Terr., Ins., p. 12. 

 Head, thorax, legs, and under-side of a deep black ; the elytra purple ; 

 antennae, palpi, and tarsi ferruginous ; head and thorax rather finely 

 punctured, the latter with four impressed points on the disc ; each 



