TRIBE VII. ERIRHIXINI. 231 



berculate as in iiidiiiiniUatus. On or between these raised places 

 the surface is white or grayish-white. If the callus is not present 

 the white spot occurs in the place w r here it should be. 



KEY TO SPECIES OF GROUP I. 



a. Disc of thorax very uneven, with numerous short ridges and depres- 

 sions. 



ft. Front foveate; alternate elytral intervals mottled with short oblong 



darker spots; larger, 4.7 5 mm. 327. MAGISTER. 



bb. Front excavated; elytra uniform sooty black without darker spots; 



smaller, 44.3 mm. 328. CAVIFKONS. 



aa. Disc of thorax without ridges and depressions, usually covered with 



small granules. 

 c. Larger, 3 4 mm. ; form robust. 



d. Elytra mottled with small pale spots or dots; thorax very coarsely 



granulate; front not foveate; length 4 mm. 329. MACULATUS. 



dd. Elytra not mottled with pale spots; thorax finely granulate; front 



foveate; length not over 3.5 mm. 



e. Sides of thorax and elytra clay-yellow, elytra with an oblique 



stripe of clay-yellow scales extending from middle of sides to 



white bar at declivity. 330. LUXATUS. 



ee. Surface uniform black except the white cross-bar near declivity. 



331. ATRATUS. 



cc. Smaller, not over 2.5 mm.; form more slender; beak shorter than 



thorax. 



f. White spot at apex of declivity single, crossing the suture in the 

 form of a small cross-bar; form very slender. 332. PUKITANUS. 

 ff. White spots two, one on each elytron; form ovate. 



333. RESTRICTUS. 



327 (8590). BAGOUS MAGISTER Lee., 1876, 186. 



Elongate-oblong, robust. Blackish-brown, the elytra mottled with 

 fuscous and pale brown scales, and with a transverse spot of pale scales 

 crossing the suture just behind the middle, this sometimes interrupted at 

 suture; antenna?, tibige and tarsi dark reddish-brown. Beak as long as tho- 

 rax, feebly tricarinate, rather stout, slightly curved; front with an elongate 

 fovea between the eyes. Thorax distinctly longer than wide, broadly con- 

 stricted near apex, sides sinuate, disc with deep channel at middle, very 

 uneven as mentioned in key. Elytra nearly one-half wider than thorax, 

 hunieri rounded, sides parallel for three-fourths their length; striae rather 

 finely and closely punctate; intervals subconvex, the second, fourth and 

 sixth elevated, the fourth ending in an obtuse tubercle on the declivity. 

 Length 4.7 5 mm. 



Lake, Starke and Marshall counties, Indiana, scarce ; May 3 

 Oct. 3. Various localities in New Jersey on water lilies in May 

 and June. Ranges from New Jersey and Canada to Michigan, 

 south to Texas. Our largest and most robust species. 



328 (8589). BAGOUS CAVIFRONS Lee., 1876, 186. 



Oblong-oval, robust, subdepressed. Black, covered with fuscous-black 

 scales; elytra each with a small, oblique spot of white scales at apical 



