1987] 
Carpenter — Family Syntonopteridae 
385 
Fig. 9. Lithoneura mirifica Carpenter, hind wing. No. 299, Wolff Collection. 
Length of fragment, 28 mm. 
Diagnosis of Family Syntonopteridae 
Medium-sized to large insects. Fore wing (incompletely known): 
costal area relatively broad proximally, very narrow distally; R 
without branches; stem of RS independent of stem R; stem of MA 
either close to RS or coalesced with it for brief interval; RS, MA, 
MP, and CUA with intercalary, triad branches; cross veins numer- 
ous, but rarely branched. Hind wing: broader than fore wing 
basally; venation essentially as in fore wing, but slightly modified by 
wing shape. Body: little known. Pronotum apparently with small 
lateral lobes. Antennae, mouthparts, legs, and cerci unknown. 
Genus Syntonoptera 
Fore wings: costal area with at least some reticulate cross veins; 
stem of MA very close to stem of RS; stem of MP remote from stem 
MA. Hind wing: venation as in fore wing but stem of MP very close 
to stem of MA. 
Genus Lithoneura 
Fore wing: cross veins in costal area without branches; stem of M 
remote from RS near wing base but then abruptly diverging ante- 
riorly to RS and coalescing with it for a short interval. Hind wing: 
