68 Journal New York Entomological Society. [Vol. viu. 



Sericoderini. 

 This tribe is well differentiated from the preceding in the oval pu- 

 bescent body, with more extensible abdomen and absence of distinct 

 post-coxal plates, and from the following in the non-explanate limb of 

 the pronotum ; from both it may be distinguished by the io-jointed 

 antennae and shorter basal segment of the abdomen, this, in the ex- 

 tended condition, scarcely equaling in length the next two together. 

 There is but a single genus. 



Sericoderus Stcph. 

 The species of this genus are so closely allied among themselves 

 that it is scarcely possible to detect structural differences of any kind, 

 and the names given below might be considered to represent subspecies 

 of a single type form. The head is completely concealed from above 

 and moderately deeply inserted, the pronotum broadly rounded at 

 apex and with the hind angles acute and considerably produced pos- 

 teriorly. The antennae are slender, with the basal joint narrowly 

 oval and inserted in shallow frontal fovea; at a slight distance from 

 antero-internal margin of the eyes, the latter usually well developed 

 and coarsely faceted. The frontal margin is feebly sinuato-truncate 

 and the labrum short and broadly rounded. The tibiae and tarsi are 

 slender, and the elytral epipleurae narrow, becoming strongly inflexed 

 toward base. The following forms seem to be worthy of distinctive 

 names : — 



Species of the Atlantic and Gulf regions 2 



Species of the Pacific slope 5 



2 — Elytra more strongly narrowed from base to apex 3 



Elytra feebly narrowed, the form more quadrate 4 



3 — Larger, pale luteo-flavate in color, the usual nubilate subapical spot of the pro- 

 notum piceous. Length 0.9 mm.; width 0.65 mm. New York to Lake 



Superior flavidus Lcc. 



Smaller, the elytra generally piceous, the pronotum flavate with the subapical spot 

 darker. Length 0.75-0.85 mm.; width O.6-O.65 mm. Massachusetts, Penn- 

 sylvania, and North Carolina obscurus Lee. 



4 — Color pale flavate throughout, the elytra never darker, smaller in size than 

 flavidus and more southern in distribution. Length 0.75 mm.; width 0.6 mm. 



Texas (Brownsville and Austin), Florida and Illinois subtilis Lee. 



5 — Larger, very broadly oblong, coarsely pubescent, dark rufo-testaceous, the usual 

 subapical spot of the pronotum darker ; elytra but feebly narrowed from base to 

 apex ; metasternum coarsely imbricato-reticulate but not distinctly punctured. 

 Length 0.85 mm.; width 0.68 mm. California (Monterey). 



quadratus, sp. nov. 



