II. M. PAKtSIILEY 
().") 
roachiiifi middle of tylus, slishtly v;u’i;d)le in length and thickness, the second 
in length equal to or very slightly exceeding width of head I)etween eyes; 
rostrum extending not quite to base of ])rostermim. Pronotum (fig. 3()d) 
moderately convex, the transverse depression distinct; width slightly more 
or slightly less than width of hemielytra at widest point; lateral margins 
with irregular coarse teeth, the exjjanded i)ortion narrowed anteriorly and 
posteriorly; carinae well elevated. Scutelhmi much longer than ])ronotum 
(31 to 20), elongate, pentagonal, sides angulate, parallel in basal third, straight 
to rather narrow ai)ex, or sometimes more or less evenly arcuate, moderately 
elevated; disc slightly elevated before middle, with two shallow depressions 
at base. Hemielytra stnmgly narrowed, exi)osing disc of abdomen at sides; 
(cf ) extending to genital lobes, corium to middle of fourth segment ; ( 9 ) about 
to middle of sixth, corium to apex of third; exocorium moderately and some- 
what variably expanded at base; mesocorium with one, endocorium without 
distinct transverse veins, but with numerous fine transverse ridges more or 
less developed; abdomen broadly oval, sides distinctly notched. 
cf (fig. 30b). Fifth ventral segment about as long as sixth; genital seg- 
ment rather short, strongly convex, carinate. L('ngth, T) to 7 mm. 
9 (fig- 30a). Dorsal genital segment twice as wide as long, the posterior 
margin arcuate, truncate at middle. Length, (i to S.5 mm. 
Type siiociiiiciis (United kitates) lost. 
Tills species, cuininoiily found about the shelf-fungus of bifch 
{ I\il]jporus), is very varialile in color, size, and certain details 
of structure, but it is distinguishable by the form of the pro- 
notnm, short second antennal segment (which is of somewhat 
variable thickness), and usually by the antennal coloration, in 
addition to genitalic criteria. Mr. Blair, of the British Museum, 
has kindly sent for examination a specimen (Nova Scotia) from 
the type series of alker’s /uxc/coivds; this represents a common 
pale brownish form with markings almost oliliterated, although 
the third antennal segment is paler than the others, ddie sec- 
ond antennal segment is slightly longer than the distance be- 
tween eyes and is rather slender. This specimen is a female, 
7.7 mm. in length. Intergradations between this form, variety 
cciitriguitatus, and typical .sb/o'/bs are of common occurrence, 
without relation to locality, and it is impossilile to draw s])ecitic 
distinctions among them. It is interesting to note that Say 
was aware of the variability of his species, for he writes in con- 
nection with the original description: “The penultimate joint 
of the antennae is sometimes very dull and almost obsoletely 
whitish.” 
TR-\NS. AM. ENT. S<JC., XLVII. 
