1977] 
Porter — Mesostenines 
67 
PHAENOLOGY: Peaks in spring and fall; possibly absent in sum- 
mer. Valley records include 1 female for January, 9 females and 5 
males for March, 1 male for April, 1 male for May, 1 male for 
August, 1 female and 3 males for September, 1 male for October, 
and 4 females for December. North of the Valley introita flies 
from mid-spring to early fall but disappears by July in most of 
Texas. 
22. Diapetimorpha aeadia Cushman 
SPECIMENS EXAMINED: 1 female, 4 males: BOTANICAL GARDEN 
(Net: 1 female, 1 male, 12 III ’77; 1 male, XII ’73; Malaise: 2 fe- 
males, III 74). 
HABITAT: Exposed areas to dense woods; weeds in bright sun; 
partially shaded hedge row; Celtis lindheimeri-C. pallida thicket. 
DISTRIBUTION: Va. to Tex. and Mexican state of Coahuila. 
PHAENOLOGY: Valley records are for December and March. 
North of the Valley it flies from late spring to early fall and peaks 
between 15 August and 15 September. 
Genus Listrognathus 
23. Listrognathus glomerata Townes 
Townes (1962, p. 424 -425) gives one undated record of this spe- 
cies from “Cameron County, Texas”. I have not collected glom- 
erata personally. 
Glomerata ranges from New Jersey to south Texas and flies 
mostly from early spring to late fall. 
24. Listrognathus rufitibialis Cushman 
SPECIMENS EXAMINED: 19 females, 3 males: BENTSEN PARK (Net: 
2 females, 12-20 III 77; 2 females, 23-30 XII 76); BOTANICAL GAR- 
DEN (Net: 6 females, 9-11 I 76; 1 female, 16 I 75; 1 female, 24 I 
76; 1 male, 12-20 III 77; 1 male, 16-30 V 74; 1 female, 19 XII 
76; 4 females, 22-28 XII 75; 2 females, 1 male, 20-31 XII 73). 
habitat: Exposed to shaded areas; fields at edge of woods; Ser- 
jania vines in woodland clearings; in bright sun among small herba- 
ceous plants on paths through open brushland, 
DISTRIBUTION: Eastern U.S. from N. J., Ind., and Okla. south- 
ward. 
