1977] 
Porter — Mesostenines 
55 
strongly projecting subligulate to ligulate, 0.7-1. 2 as long as 
wide at base; broad white orbital ring interrupted only at bot- 
tom of eye; humeral margin of pronotum white throughout; 
scutellum pure white; first gastric tergite with a white apical 
band (except in S. Florida populations) 
16. D. macula (Cameron). 
First flagellomere 5. 5-6.0 as long as deep at apex; lower meta- 
pleuron with strong longitudinal wrinkling* that becomes re- 
ticulate on dorso-posterior half; dorsal face of propodeum 
between trans-carinae with strong, complexly reticulate wrink- 
ling; propodeal cristae prominent, broadly cuneate, 0.4-0. 5 
as long as wide at base; white only on frontal orbit; humeral 
margin of pronotum more than half black; scutellum yellowish 
ferruginous; no white on apex of first gastric tergite 
1 7. D. sphenos n. sp. 
6. Lower metapleuron with strong longitudinal wrinkling; whitish 
at least on pronotal collar and propodeal cristae 7 
Lower metapleuron either only punctate or punctate and obliquely 
wrinkled; no white on mesosoma 8 
7. Malar space 0.80 as long as basal width of mandible; mesosoma 
brownish ferruginous, except for whitish pronotal collar and 
propodeal cristae; fourth gastric tergite dusky 
D. brunnea Townes 
Malar space 0.63-0.73 as long as basal width of mandible; meso- 
soma fulvous with profuse yellowish white markings includ- 
ing scutellum, humeral margin of pronotum, and a pair of 
median stripes on mesoscutum; fourth gastric tergite fulvous. 
D. alabama Cushman 
8. Malar space 0.65-0.75 as long as basal width of mandible .... 
22. D. acadia Cushman 
Malar space 1.05 as long as basal width of mandible 
D. rugosa Townes 
Males 
1. Gastric tergites 2-7 black or brownish black with broad white 
apical bands 2 
Gastric tergites 2-7 ranging from yellowish fulvous to ferru- 
ginous, sometimes with blackish basal bands but never with 
white apical bands 5 
