NOKTII AMKI;1C:AN COLKOl'TKRA. 45 



Ventral segments nearly equal in length ; aiitennse slender, a little broader at 

 tip, seventh and eighth joints not dissimilar in thickness; head with well 

 developed eyes; met-episterna visible their entire length. ..l^yrosoiliiiii. 



Ventral segments unequal, the first along the middle line as long as tiie next 

 three, fourth very short; antennie thickened at tip, the eighth joint smaller 

 than the seventh or ninth; head without eyes; niet-episterna concealed in 

 front I*iii<»<l.ytiiii. 



At the time of my "Synopsis of the Silphichie" I attributed six 

 veiitial segments to Fliiodytes, whereas there are but five, the error 

 having arisen from considering an extruded genital portion as a 

 small terminal segment. 



I*. Haiiiiltuiii n. sp. — Oblong, moderately elongate, not very convex, cas- 

 taueous, moderately shining. Head sparsely punctate. Thorax quadrate, 

 scarcely a fourth wider than long, slightly narrowed in front, sides slightly 

 arcuate, hind angles rectangular, disc finely, equally, but not closely punctate. 

 Elytra very slightly wider at base than the base of the thorax, sides feebly arcu- 

 ate, gradually narrowed at apical third, surface with fine shallow striae, which 

 are finely and closely punctate, the strife at the sides and apex le.ss distinct, in- 

 tervals flat, sparsely punctate. Length .l(i — .18 inch. ; 4 — 4.5 mm. 



In the male the last ventral segment is truncate, the penultimate 

 with a ntoderately deep transverse depression on each side. The 

 female has the last ventral oval at tip and the penultimate without 

 depressions. 



Notwithstanding the great difference in size between this and the 

 other species of the genus no valid generic distinction has been 

 observed. 



For this species I am indebted to Dr. John Hamilton, who col- 

 lected them in the vicinity of Allegheny City in this State, and 

 kindly gave them to me several years ago. 



V. \*usU* n. sp. 



This name is suggested for a species still smaller than eri/pfoj)h(t- 

 goides, which it resembles in color and form, except being a little 

 more elongate. The elytral sculpture consists of fine punctures in 

 stri;e as in that species, but more impressed. The |)rincij)al struc- 

 tural difference is in the antennae, in which the seventh and eighth 

 joints are not very dissimilar in size and the three joints forming 

 the club somewhat longer than in cryptophacf aides. Length .06 inch. ; 

 1.5 mm. 



Alameda County, Cal., collected by Mr. Chas. Fuchs. 



The species now known to me may be separated in the followini: 

 manner : 



TK.\NS. AM. KNT. SOC. XIX. MARCH, 1892. 



