1986] 
Porter — Sonoran genus Compsocryptus 
27 
propleuron, sometimes with a pair of black spots on pronotum 
dorsally behind collar, sometimes narrowly black on anterio-lateral 
margin of pronotum, sometimes narrowly black on much of hind 
margin of pronotum, vaguely to extensively blackish on prepectus, 
sometimes tinged with black in meso and metanotal axillary 
troughs, sometimes blackish behind subalarum, sometimes black 
stained in mesosternal sulcus, and sometimes blackish on margins of 
lower metapleuron; gaster with slight to conspicuous blackish stain- 
ing, often irregularly on 2nd tergite and always rather broadly on 
tergites 5-7; fore tibia and tarsus yellowish with tarsus compara- 
tively dark and dusky on last segment; mid leg with blackish in part 
on trochanter and trochantellus, femur pale yellow on apical 0.2 and 
otherwise blackish to brownish, tibia pale yellow, and tarsus dusky 
with dirty yellow on basal 0.5 of first segment; hind leg with black 
and brown staining on trochanter and trochantellus, femur black or 
dark brown, and tibia black with a broad, dull yellowish-white 
prebasal band covering about 0.25 of segment. 
Length of fore wing: 8.6-10.3 mm. Flagellum: linear, largely per- 
current tyloids present on segments 11 or 12-21, 22, or 23; 1st 
segment 2.6-3. 1 as long as deep. Malar space: 0.82-0.93 as long as 
basal width of mandible. Mesoscutum: shining with abundant, 
small, sharp punctures that generally are separated by more than 2.0 
their diameters. Mesopleuron: similar to female but with coarser, 
longitudinally biased wrinkling and larger intercalated punctures. 
Hind femur: 5. 5-7. 2 as long as deep. First gastric tergite: postpetiole 
smooth and shining with abundant but well separated tiny punc- 
tures whose setae mostly overlap laterad but become somewhat 
sparser toward the meson. 
Specimens Examined. 31? and 2A$\ ARGENTINA, Formosa 
Province, Arroyo Eh Eh Grande, 76 km N Formosa, Rta. 11, 
14-VIII-1977, C. Porter, L. Stange, P. Fidalgo, Arroyo San Hilario, 
15 km S. Formosa, Rta. 11, 1 1-12-VIII-1977, C. Porter, L. Stange, 
P. Fidalgo, Riacho Pilaga, 27 km N. Formosa, Rta. 11, 12-VIII- 
1977, C. Porter, L. Stange, P. Fidalgo; Salta Province, Dique 
Itiyuro, 70 km N. Tartagal, 30-VII-1977, C. Porter, L. Stange, P. 
Fidalgo, Tartagal, 1 1 - 1 8-VIII- 1 973, C. Porter, 10 km N. Vespucio, 
12-VIII-1976, C. Porter, L. Stange, Rosario de la Frontera, 19-VI- 
1972, C. Porter; Tucuman Province, Rio Nio, 30-XI-1964, C. Por- 
ter, San Pedro de Colalao, 19-XII-1964, C. Porter, Villa Nougues, 
26-27-XI-1964, 6-7-XII-1964, C. Porter; Santiago del Estero Pro- 
