154 A. MATTHEWS. 



N. fungi Motschulsky Bull. Mosc. 41, p. 187, 1868.— L. c. .26 mm.— Linear, 

 elongate, moderately convex, rufo-testaceous, clothed with a very short yellow pu- 

 bescence ; head large ; eyes large, not prominent; thorax scarcely longer or wider 

 than the head, with the basal angles nearly right angles; elytra long, linear, not 

 wider, but nearly twice as long as the head and thorax, faintly asperate, apex 

 broad, much rounded; legs and antenn?e yellow. 



United States (Motschulsky). 



THROJi^CIDIUlfl. 



Matthews Trieh. Illust. p. 64, 1872. 



Head sessile, antennae 11-jointed, 2 basal joints large, 2d longer than 

 the 1st, 3-8 slender and elongate, last 3 very much incrassated, form- 

 ing a moniliform club. 



Thorax moderate, dilated at the base, posterior angles generally pro- 

 duced. 



Elytra entire, generally obtuse at the apex. 



Abdomen with the pygidium only exposed. 



Prosternum very short, with the coxal cavities open. 



Mesosternum rather short, very«.strong]y carinated, coxal cavities sepa- 

 rated by the carina. 



Metasternum long, produced between the posterior coxae into a small 

 acute point. 



Posterior cox^e extending to the sides of the body, and very broadly 

 laminated. 



Ventral segments seven. 



T. invisibile Trichopteryx invisibilis, Nietner, Ann. and Mag. Nat. Hist. 

 New Series xix, p. 378, 1856. Anatrichi.t clovgatuhi, Motsch. Bull. Mosc. 41, p. 

 180, 1868. — L. c. .5(1 mm.— Elongate, oval, convex, rather shining, livid testaceous, 

 densely covered with silvery pubescence; head large, sessile; eyes small, rather 

 prominent; thorax short, dilated at the base, closely covered with minute tubei'- 

 cles, posterior angles nearly right angles ; elytra long, not wider, but half as long 

 again as the head and thorax, elegantly and reticulately asperated, apex broad and 

 rounded ; legs and antennte very pale yellow. 



Central America (Motschulsky), Guatemala (Champion). 



NOSSIDIUIVI. 



Erichson Ins. Deutsch. 3, p. 17. 1845. 



Body oval. 



Antennae 11-jointed, 1-2 very large, 3-8 slender, 9-11 much incrassate, 



forming a moniliform club. 

 Head sessile, deflexed. 

 Pronotum large, dilated towards the base. 

 Elytra entire. 



