72 
Psyche 
[March 
DISCUSSION: These are the first records of leucosoma from the 
United States and Mexico, the species having been cited previously 
only from Guatemala (Cameron, 1886, p. 259). 
A homotype from Guadalajara, Mexico loaned by H. K. Townes 
differs from my Texas material only in having the tegula a little 
more broadly white, the sides of the scutellum white, and the post- 
scutellum white. 
One of the Valley specimens was collected in the humid “Sunken 
Garden” at the Valley Botanical Garden, where it was swept from 
weeds at the edge of a thicket dominated by Ehretia anacua. The 
other was taken at Bentsen Park along the banks of the Rio Grande 
in Serjania vines beneath Salix nigra and Celtis lindheimeri. 
Genus Acerastes 
30. Acerastes pertinax (Cress on) 
SPECIMENS EXAMINED: 87 females, 92 males: BENTSEN PARK 
(Net: 3 females, 12-13 I ’76; 3 females, 19 I 76; 3 females, 18-19 
III 76; 1 male, 17 VI 73; 2 females, 1-13 VI 76; 1 female, 30 VIII 
76; 1 female, 7 IX 76; 2 females, 27 XII 75; 6 females, 29-30 XII 
76; Malaise (1976): 4 males, 15-30 IV; 5 females, 10 males, 1-15 
V; 1 female, 20 males, 16-31 V; 1 male, 1-15 VI; 1 female, 16-30 
VI; 1 male, 1-15 VII; 1 male, 16-31 VII; 2 males, 16-31 VIII; 5 
males, 1-15 IX; 1 female, 2 males, 1-15 X; 6 males, 16-31 X; 1 
female, 1 male, 1-15 XI; 1 female, 1 male, 16-30 XI; 1 male, 16-31 
XII); BOTANICAL GARDEN (Net: 1 female, 5 I 75; 1 female, 18 I 
75; 1 female, 26 I 76; 2 females, 1 male, 12-21 I 76; 4 females, 1 
male, 17-24 III 74; 1 female, 5 IV 75; 1 male, 16-30 V 74; 1 
male, 1 VI 75; 5 males, 1 IX 76; 1 female, 18 XII 76; 9 females, 
1 male, 20-31 XII 74; Malaise (1973): 3 females, 18 males, X; 
26 females, 8 males, XI; 9 females, XII). 
HABITAT: Open to dense scrub or woods with abundant ground 
cover of grasses, forbs, or vines; gallery woods; Celtis lindheimeri- 
C. pallida association; etc. Townes (1962, p. 405) gives the ’’usual 
habitat” of pertinax as “weedy fields or meadows” but it rarely 
enters such areas in south Texas. 
DISTRIBUTION: Md. to Fla. and Tex. south to Brasil; Cuba, Ja- 
maica. 
PHAENOLOGY: Valley populations fly almost throughout the year 
with a spring peak in March-May and a fall maximum from Sep- 
