1977] 
Porter — Mesostenines 
69 
2. Mesoscutum with a single median white spot; lateral lobe of 
mesoscutum throughout with medium-sized, sharp, moder- 
ately dense punctures 27. L. cinctiventris (Cushman) 
Mesoscutum with a pair of submedian white stripes; lateral 
lobe of mesoscutum, except on about basal 1/3, sparsely 
punctate 28. L. orbus (Say). 
3. Discoidella completely absent; lateral lobe of mesoscutum pol- 
ished; second gastric tergite black with a broad white apical 
band; fore wing without dark cross bands 
L. bicinctus (Cresson). 
Discoidella well developed; lateral lobe of mesoscutum mat; 
second gastric tergite wholly fulvous; fore wing with a median 
and subapical dark cross band 4 
4. Clypeus prolonged ventrally as a conical point; malar space 1.5 
as long as basal width of mandible; head mostly fulvous and 
without black areas; no white on pronotum, subalarum, and 
propodeal cristae L. nasutus (Pratt). 
Clypeus strongly convex but not pointed ventrally, the apical 
margin almost truncate; malar space 0.66 as long as basal 
width of mandible; head mostly black, sometimes with cly- 
peus and face fulvous; white on broad anterior margin of 
pronotum, subalarum, and propodeal cristae 
29. L. leucosoma (Cameron). 
27. Lymeon cinctiventris (Cushman) 
SPECIMENS EXAMINED: 1 female, 4 males: BENTSEN PARK (Net: 
1 female, 29 XII 76); BOTANICAL garden (Net: 2 males, 16 I 75; 
1 male, 1 IV 75; 1 male, 24 XII 74). 
HABITAT: Damp area in tall grass beneath Salix nigra and Acacia 
farnesiana near irrigation canal. 
DISTRIBUTION: Md. to Fla. and west to Tex. 
PHAENOLOGY: Valley records are for December, January and 
April. Farther north, cinctiventris flies between April and Septem- 
ber. 
28. Lymeon orbus (Say) 
SPECIMENS EXAMINED: 3 females: BENTSEN PARK (1, 19 I 76); 
BOTANICAL GARDEN (1, 1 IV 75; 1, 30 XII 74). 
