72 
Psyche 
[March-June 
spinules more slender and appressed ; small oval area apparently 
free of pores or sensory structures at each side of central patch of 
spinules. Mandible (Figs. 9, 10) .41 mm long, .20 mm wide near 
base, with single basal seta; inner margin with four distinct rounded 
teeth in about the same plane and decreasing in size from apex to 
base; basal tooth blunt and transverse; conspicuous, broadly-rounded 
laminar protuberance between and ventral to second and third 
teeth; dorsal surface with polygonal sculpturing near teeth. 
Maxilla (Fig. 11) strongly and broadly produced mesally, but 
not angulately so, inner margin densely spinulose, spinules moderately 
long and appressed ; lacinial area with conspicuous tuft of long 
slender erect spinules; outer margin with four or five strong lateral 
setae of maximum length 46 /x ; palpus 50 jx long, stouter than galea 
which is 28 /x long. Hypopharynx a broad lobe with strong dense 
spinules. 
Labium (Fig. 12) with oral surface of prementum completely 
clothed with moderately long spinules of maximum length 19 /x, 
spinules not separated into patches; base of prementum strongly 
sclerotized on oral side and separated from remainder of labium by 
distinct suture; palpi 43 /x long, exceeded by paired spinnerets which 
are 73 jx long, spinnerets slender and truncate apically. 
Discussion 
Entomognathus can be categorized as a genus of chrysomelid- 
hunters, based upon the prey records presented in this paper. Thus 
far there is no species overlap in the genera of Chrysomelidae preyed 
upon. The European E. brevis is the most polyphagous species 
which has been studied, preying upon no less than 17 species of 
Alticinae and Cryptocephalinae (Table 1). The North American 
E. ( Toncahua ) texanus captures galerucine leaf-beetles, whereas 
E. ( Toncahua ) memorialis preys upon alticine leaf-beetles. One 
prey species of the latter, A. ul?ni J has been reported to feed in 
the field only on Ulmus americana, the American elm (Woods, 
1918). Nevertheless, we were unable to discover where hunting 
and prey capture took place. A second prey species, A. marevagans, 
has been collected on Oenothera biennis , the evening primrose 
(J. A. Wilcox, correspondence). The fact that slightly more males 
than females were taken by E. memorial i$ is puzzling in view of 
Blatchley’s (1910) statment that males of Altica are “much less 
abundant than the females.” 
The prey of E. memorialis is relatively large compared to that 
of some other crabronine wasps. For example, mean prey/wasp 
