
366 THE AMERICAN NATURALIST.  [Vor. XXXVI. 
COLEOPTERA. 
CARABID. 
1. Anillus affabilis sp. nov. 
Length 2 mm. Rufotestaceous, darker anteriorly, elytra lighter than 
head and thorax. Head smooth, shining ; frontal impressions deep but 
not large. Antenna testaceous, scarcely longer than head and thorax, 
slightly thickened towards apex.  Palpi testaceous. Thorax distinctly 
wider than long, widest near the anterior angles, narrowest at base. The 
sides arcuate anteriorly and slightly sinuate posteriorly. Surface sparsely 
but distinctly pubescent. Side margin very narrowly reflexed, distinctly 
serrate, with four or five teeth near the slightly obtuse posterior angles. 
Median line delicately but distinctly impressed. Posterior transverse 
impression arcuate, the surface finely 
rugose behind it. Elytra considerably 
wider than thorax, distinctly serrate at 
the broadly rounded humeral angles and 
posteriorly to middle, where the teeth 
become obsolete. Side margin regularly 
arcuate, not at all angulated. A row of 
large punctures near the lateral margin, 
growing smaller and less distinct toward 
the apex, form an ill-defined, broad lateral 
stria. Dorsal striz almost obsolete, the 
first three very faintly impressed, remain- 
der indistinguishable. Elytra tra with three 
long lateral setze, one at humeral angle, 
one at posterior third, and one subapical. 
Just anterior to the first long seta is à 
shorter one. Elytra sparsely clothed 
with erect pubescence. Legs pale tes- 
Fic. 1. — Anillus affabilis sp. nov. taceous. 5 

Described from three specimens collected at Austin, Texas. 
Two were sifted from a nest of Eciton cavum Latr., and one 
from a nest of Solenopsis geminata Fabr. While A. affabilis 
may not be strictly myrmecophilous, it is evidently partial to ant 
nests as a habitation. 
This species most closely resembles A. explanatus Horn, from 
which it differs in having broadly rounded humeral angles, no 
angulation of the elytral margin, and by the three large elytral 

