Psyche 
[June 
162 
Fig. 7. Detail of left jaw of larva of ^Pronymphes mengeanus (Hagen) 
showing the small setae at the tips of the three proximal mandibular teeth 
and the globular tips of additional setae. Setae elsewhere on the body 
proper have these same modified tips. (Photographed with a Zeiss com- 
pound microscope using Nomarski interference contrast optics.) 
be interesting to see if the larvae of the species of Nesydrion , when 
they are discovered, will throw any light on this question when they 
are compared to the presumptive larva of Pronymphes described 
below. 
Pronymphes mengeanus (Hagen) 
Nymphes mengeanus Hagen, 1854, Verhandl. zool. bot. Ver. Wien 4: 228. 
( Nomen nudum). 
Nymphes mengeanus Hagen, 1856, in Berendt, Die im Bernstein befindlichen 
organischen Resten der Vorwelt 2: 85-86, PI. 8 (fig. 15). Type speci- 
men stated to be in the Danzig Provincial Museum by Kruger (1923), 
not examined. Hagen, 1866, Stett. Ent. Zeit. 27: 453; Scudder, 1891, 
Bibliog. of Fossil Ins., p. 354; Handlirsch, 1906, Die fossilen Insekten, 
p. 908. 
Pronymphes mengeanus , Kruger, 1923, Stett. Ent. Zeit. 84: 75-80; Weidner, 
1958, Mitt. Geol. Staatsinst. Hamburg 27: 67. 
? Pronymphes sp. (Larva) 
(figs. 5-7) 
Ascalaphidarum Genus, species, Larva (Planipennia) , Weidner, 1958, 
Mitt. Geol. Staatsinst. Hamburg 27: 64-67. 
Description . Head : somewhat quadrate, with broadly rounded 
occipital margins which are not, however, cordate; surface some- 
