356 NEW YORK STATE MUSEUM 
17 An oblique metallic streak extending inward from each 
humerus; posterior part of the thorax metallic. Length 2 
OMS TR cclenete oe we Mane 7 a ahs eal eee eee venustum 
Humeral spots not metallies si... oe. ceed ee «aks eee (18) 
18 Anterior coxae yellow; long hair on femora and hind tibiae; 
thorax velvet black with white pruinose margin (Green- 
FAIG) 0 oo sig Gee m  6ki.0 Hikse Bisadest ave eee duwee le eos loys ene Chevette ee reptans 
Anterior Coxae. DIGG sos ein ak: Sues ols clades 0 ochselnleuens a hee er (19) 
19 Thorax velvet black, with oblique cinereous humeral spots, 
and usually two tiny metallic spots between them. Length 
Be WO ANTI, ay ch a ooadescofe egeteten ew ts Bela wale Gucug ace ble seta sore pictipes 
Thorax velvety black with two very narrow gray stripes 
and posterior margin; hind tibiae usually yellow at the 
base, hair. on lOes: SPARSE sce c nities cielo « +) shes wi neile 1oiete cues eee vittatum 
SOMO Ra xe STR OC viei pas sia aeeie etek ea dea eee ae sled cle gO Okie (21) 
Thorax ‘without Stripes. oie evere eee ee kb wie | a ew elle ce ate fone) ooo ener (25) 
21 Dorsum of thorax with four longitudinal lines, posterior 
margin, white pollinose; abdomen opaque black. Cuban : 
ro 0{ 21 Ch | amas ia Ame nat mene Reine! en IAes See S quadrivittatum 
Notrwith: £OUr SUTIPES . erie. t ws Feinnd 6 Six Cob een ete ot eee ee ee 4 (22) 
22 Dorsum of the thorax with five stripes, the outer ones spot- 
like, the intermediate ones clubbed at the ends; abdomen 
with black fascia on each segment, produced posteriorly 
at the middle and the ends. Sometimes the last few seg- 
ments have only three or five spots............ th ote «ale 6 te We el 
Thorax with,ione or three stripes: 5. ........0246 a. ee 5s eee (28) 
Zo With threG@uStripes sos slid ices «ade. Bara edousliate ww ee ceum boe ease ee (24) 
“With an indication of a darker median vitta’”’ [see 31]....griseum 
24 Small species, length about 15mm. ‘Abdomen silvery, 
third and fourth segments wholly brownish, sometimes 
with a median spot on each; legs yellowish, tarsi blackish 
or brownish.” Species from Texas. i..5 s.20.ces s tamaulipense 
Larger species 3mm. or more in length... .......-...++ «cee (24a) 
24a Middle tibiae brown with a yellow ring beyond the base; 
vittae of mesonotum brownish, the median vitta dilated 
posteriorly, wider than either of the lateral ones. New 
DER ACO ia ie: ai a) wis. ce sia ty vacevg svele cuales oe er one DU ersihets ie ene aa ene eee virgatum 
Femora and tibiae grayish, sometimes quite pale, tips of 
tibiae black. Laterodorsal thoracic stripes clubbed at the 
anterior end. Third, fourth, fifth, and part of sixth and 
seventh abdominal segments with velvet black fasciae; 
center of 6, 7, and’8, grayish or dull browiiac.. ss. noe ee pictipes 
2) Abdomen without distinct black spots... :..5..:40 0 «cess eee (26) 
ADGomen spotted... een seid sleds Red aliens Hee ee Ie ee (81) 
26 Abdomen black, covered with long yellow pile; legs yellow, 
the tips of the femora and tibiae, and all the tarsi except 
basal two thirds of the hind metatarsi, brown...... bracteatum 
Abdomen nearly bare: .. 62 bite vewew aahlioweneue wea ee (27) 
=i Rogy pray or ciereous.\. 3 is geal weak sce eee (28) 
