JAMES A. IIEIIX 
Size small; form moderately slender, less robust Ihaii in Irupulra and miii'li 
more slender than in arachidis; surface moderately polished with excei)tions 
noted below. 
Head in outline broad pyriform, f>;reatest width across eyes faintly less 
than }>;i'<‘atest lenjith of same; interant ennal-int(‘rocular ref^ion with its ccaitral 
area sulxh'planate; occiput with paired arcuately and transversely disi)osed 
impressions,^ which an- separat(‘d mesad, in contact with eyes laterad; cando- 
lateral occii)ital anji;les well rounded, this refjion with a few short bristle-like 
hairs; nu'dian portion of occipital marf>;in shallowly obtuse-annulate eniarnin- 
atc. Kyes little i)romincnt, slightly lonner than i)ostocular portion of ncnae. 
Anteiinae damaned.'* 
bronotum sulxiuadrate, slinhtly transverse; cei)halic marnin subtruncate, 
lateral marnitis approximately parallel, caudal marnin Iwoadly and entirely 
arcuat(!, passinn into the lateral marnins; surface of 'cephalic half of disk 
api)reciably convc^x with a brief median sulcation cephalad, caudal section 
mesad with a subcfjual section reachinn to caudal marniri and weakly convex 
in transverse .section, narrow cephalo-lateral and broad cando-lateral portions 
subdeplanate. Tenmina as in I\ Ird/i/dni, but distal marnin weakly concave. 
\\ inns l)rojectinn <listad of the tenmina somewhat less than one-half of lennth 
of latter, immediate ap(‘X narrowly truncate. 
.MxlomfUi short fusiform, much as in //'h/ac/rn, surface larnely ami obscurely 
imi)resso-])unctulate and almost com])l('tely without hairs; alxhjininal keels 
as in Irujuclra but distal pair mon; [jn-nounced; anal senment rectannulate 
transvcr.se, greatest lennth nearly three, tim(!S in greatest width; distal margin 
with extremely slight projections above insertion of each forceps arm, these 
projections weaker than in triqucini, nx'sad this margin is truncate; surface, 
of anal segment appreciably' declivcnt meso-distad and there, near margin, 
with a brief median sulcation. Pygidium subcpiadrate, about one and one- 
third times as wide as hmg, lateral margins subparallel, caudo-lateral portions 
narrowly' oblicpic truncate, di.stal margin sul)truncate, non-cingulate, lateral 
angles of caudal margin with Inief tuberculations; surface of i)ygidium mark- 
edly inflated and bullate, a deep medio-longitudinal sulcation indicated on 
proximal three-fourths. Forceps of the general type and form found in /'. 
Iriquelra, but more slender and rather more regidarly tapering, in section 
more nearly etiuilateral than in triqurtni, as the dorsal carina instead of being 
internal in position, as in triqwtrn, more nearly api)roaches the median line 
of tlu! arm, ])articularly' ni(!sad; [U'oximo-internal tooth distinct though small, 
rounded tuberculate; internal mai'gin distad of t(X)th nnarmed; distal half 
® These impressions may have been pnxluced by shrinkage of the chit in 
in the drying of this specimen, which had been pre.s(‘rv(!d in alcohol, and for 
that reason we have not given them as diagnostic features, d hey are 
represented in triqudm oidy' by' slight indications, and, while ((uite regular 
in the present specimen, we prefer to await the ac(|uisition of further material 
before citing them as distinguishing features. It is necessary, however, to 
discuss them in the general description on account (d their striking character 
and, possibly normal, occurrence in the ty'i)e. 
^ These appendages were intact when first examined, both in spirits and 
dry, and the preliminary generic assignment was then made. 
TU.VXS. AM. EXT. SOC., XLVII. 
