53 



Trichopteryx grossa. 



Acratrichis grossa, Motschulsky, Bull. Mosc. xli. 2, p. 177. 

 '/'. grossa, Matthews, Trans. Am. Ent. Soc. si. p. 128, 1884; Biol. Cent.-Ai 

 Col. ii. pt. i. p. 1:51, 1888. 



L. c. ,";. ,',, lin. = 1-1 - 12 mm. — Latissima, valde convexa, nigra, nitida, pilis 

 griseis parce vestita; capite magno, lato, antice producto, fere glabra; pronoto 

 permagno, valde convexo, nitidissimo, postice valde dilatato, punctis minutis, 

 remotis, distincte impresso, interstitiis glabris, nitidis, lateribua rotundal 

 late marginatis, atque s< a prope basim utrinque instructis, mai -ali 



fere recta, angulis latis, valde productis, dilutioribus : elytris bre\ ibus, postice valde 

 attenuatis, fuscescentibus, capite atque pronoto brevioribus et parum angustiorib 

 ordinibus transversis, sinuatis, leviter et confertim asperatis, lateribus fer< 

 seta brevi, erecta, prope humeros atque altera basim versus ntrinque instructis, 

 apicibus latis, fere rectis, dilutioribus ; abdomine modice exserto, apice profounde 

 tridentato; pedibus robustis, obscure flavis ; antennis longis, gracilibas, pieeo- 

 testaceis. 



Body very broad and very convex, black, Bhining, sparingly clothed with grey hair. 



Head large and broad, produced in front, nearly smooth ; eyes rather large, not 

 prominent : antenna' long and slender, pitchy-testaceous. 



Vhorax verj large, \>v\ convex, and very shining, much dilated at the ba 

 minutely, remotely, and distinctly punctured with the interstice- smooth and 

 shining, sides rounded, rather broadly margined, with an erect seta on ea 

 side near the hase. basal margin nearly straight with tht: angles broad, much 

 produced, and pale. 



Scutellum very large and broad, finely asperated. 



Elytra short, much attenuated posteriorly, fuscesceut, shorter and rather narrower 

 than the bead and thorax, finely and closely asperated in transverse, wavy- 

 rows, sides nearly straight, with a short, erect seta on each side near the 

 shoulders, and another towanls the apex, extremities broad, nearly straight, 

 and pale. 



Abdomen moderately exserted, strongly tridentate at the apex. 

 dusky yellow. 



Under parts black with the mouth and coxre piceous. 



Differs from others in its large size, short, convex form, large, shining, and 

 minutely punctured thorax, long antennas, and erect lateral seta 1 . 



Habitat, North and Central America. Found in Washington, and by Mr. Champion 

 in Vera Paz, ( Guatemala. 



Col. Motschulsky's description of A. grossa agrees with this species; his 

 specimens wen found in North America. 



Trichopteryx fratercula. 



r. fraterctUa, Matthews, Ent. Mo. Mag. xv. p. 65, 1878. 



L. e. ,';.- , 7 , p lin. = 0"76 - 87 mm.- -Sat brevia, lata, nigra, nitida. pilis brevibus 

 fulvis vestita ; capite magno, lato, tuberculis minutis, remotis, ordinibu i ctis 

 ornato, interstitiis nitidis, reticularis : oculis magnis, Bal prominentibua ; pronoto 

 ■ii", capite longiori, et multo latiori, ante basim latissimo, valde convexo, con- 

 fertissime reticulato sive alutaceo, tuberculie minutis, remotis, ordinibus rinu 

 ornato, lateribua rotundatia el late marginatis, margin.' basali leviter Binu 

 angulis latis, valde productis, atque ad modum I da arctica rostri externe 



dilatatis ; elytris brevibus, postici parum attenuatis, capite atque pronoi 

 pariter longis, parum angustioribus, ordinibus tram- -at remotis, mod 



