8 
Psyche 
[March 
its tip a retractile, tubular tenth segment that functions as a spin- 
neret; (f) short, powerful walking legs; and (g) dolichasterine 
(trumpet-shaped) setae of diverse morphology over part or most 
of the body surface (figure 8). Like most Planipennia, ascalaphid 
larvae pass through three instars prior to pupation. 
LARVA OF ULU LODES MEXICAN A (McLachlan) 
(Refer to figures 1-4) 
Generic Description: Ululodes Currie. 
The following description is based upon examination of nearly 
100 third instar specimens of Ululodes mexicana reared from egg 
to adulthood, together with 13 reared larvae of an unidentified 
species of Ululodes from Florida and two preserved third instar 
specimens representing a third unidentified species of the genus 
from Pima, Arizona. The generic diagnosis is also based on in- 
formation presented in two excellent works: first, that of MacLeod 
(1964), describing the morphology of the head capsule and cervix 
of Ululodes quadrimaculata (Say) from Illinois, and secondly, that 
of McClendon (1902), describing the third instar larva of Ululodes 
senex Burmeister (described as U. hyalina Latreille) from Texas. 
I have chosen to follow the terminology used by MacLeod (1964, 
1970). 
Length: just prior to pupation, 13-19 mm, not including jaws. 
Head: trapezoidal, approximately as wide as or slightly wider 
than long, broadest posteriorly and tapering evenly anteriorly; 
dorso-ventrally flattened but much thicker behind than in front. 
Cordate postero-lateral (occipital) margins. Labral margin (LmM) 
narrow and very strongly bilobed with a single wide deep notch at 
midline; labral lobes bulbous. Dorsum flat medially and convex 
laterally; ventral surface strongly convex with excavated antero- 
lateral margins permitting retraction of jaws beneath ocular tuber- 
cles (excv). Surface texture mildly rugose due to slightly raised 
bases of setae. Ocular tubercles (OT) large, prominent, approx- 
imately cylindroid but very slightly tapered distally and flattened 
dorso-ventrally; ventral stemma somewhat reduced in size com- 
pared with dorsal stemmata. Antennal tubercles (AT) prominent, 
cylindrical, nearly half length of ocular tubercles, appressed closely 
to bases of latter. Number of flagellomeres variable, usually 11 
or 12, with tip of antenna projecting far beyond end of ocular tuber- 
