Juneigoo.] CaSEY : On NoRTH AMERICAN COLEOPTERA. 69 



Very small, the elytra more rapidly narrowed from the base, piceous-brown in color, 

 the pubescence rather less coarse ; metasternum distinctly punctured, especially 

 toward the sides. Length 0.7 mm.; width 0.55 mm. California (Sonoma Co.). 



debilis, sp. nov. 



When discovered, individuals are rather abundant. Sericodcrus is 

 said in the " Biologia " to have the antenna ii-jointed, but these 

 organs are quite evidently lo-jointed in our species, and the details 

 given by Mr. Matthews for the antenna of ^. latus show that it should 

 properly form a genus distinct from Sericodd 



cms. 



Parmulini. 

 The numerous species of this tribe can be recognized at once by the 

 oblong or oval and less convex pubescent body, more or less widely 

 subexplanate at the lateral and apical limb of the pronotum, and the 

 rectangular thoracic angles. The genus Saciiim of LeConte, is said 

 by Heyden, Reitter and Weise to be the same as Parmuliis of Gund- 

 lach, but, as the LeContean Saciiun is composite, I am in doubt as to 

 which if 'any is the true Parmulus and have therefore not adopted the 

 name for any one of our genera ; it is, however, retained for the tribal 

 designation. The three genera before me may be identified by the 

 following characters : — 



Antenna 1 1 -jointed ; prosternum well developed in front of the coxce, the posterior 

 margin of the buccal opening deflexed at the middle, forming a broad mfenorly 



vertical liguliform process ••"• 



Antennae lo-jointed ; prosternum extremely short in front of the cox^^e, the buccal 



margin not at all deflexed •••• ^ 



2-Body elongate and subparallel ; antennae more elongate, the club relatively longer, 



looser and more serriform, the fifth and seventh joints both enlarged ; basal joint 



of the hind tarsi shorter, scarcely as long as the next two combined, the basal 



, . , Saciuiti 



joints thicker 1. r. ^ 



Body oval, with more arcuate sides ; antenn.^ shorter, with a more slender shaft and 

 stouter and more compact club, the seventh joint enlarged, the fifth normal ; hmd 

 tarsi with the basal joint elongate and more slender, always much longer than the 



,. , Molamba 



next two combined 



i_Body oval or oblong-oval, rather more convex but nearly as m M./<?;«/'« / an- 

 tennae moderately elongate, the club loose and well developed, the elongate third 

 joint followed by four small subequal joints ; posterior tarsi slender, with the 

 basal joint elongate, the anterior more or less dilated at base ; species generally 

 ^ Arthrolips 



minute 



The epipleur^e are horizontal, moderately wide, narrowing gradually 

 and disappearing behind the middle, the first ventral segment very 

 long, equaling the next three or four combined. 



