256 
Psyche 
[September 
Fig. 3. Lisponema singularis n. sp., dorsal view of type specimen, wings 
omitted. 
As compared to Spilo?nena bcirberi } Lisponema singularis has a 
slightly longer stigma, a marginal cell that curves away from the 
wing margin, first recurrent vein (1 m-cu) not at all interstitial 
with first intercubital (Rs), M and Cul separating fairly close to 
transverse median vein (cu-a), and, in the hind wing, a submedian 
cell which is longer and more rounded apically. These differences 
seem to me great enough to justify generic status for Lisponema. 
Some Pemphredoninae are known in which the marginal cell curves 
away from the wing margin (e.g. Protostigmus ) , although these 
differ in a number of other respects. 
Lisponema singularis, new species 
Length of body (without most of head, which is missing) 2.5 
mm; length of forewing 1.7 mm. Body fuscous, with no evident 
maculations; wings hyaline, with brown veins and stigma. Features 
of body as shown in Fig. 3 ; thoracic dorsum shining and with small, 
close punctures ; scutellum with a transverse basal groove ; propodeum 
with reticulate sculpturing, the details of which are obscure, laterally 
with two small dentiform projections on each side; legs smooth and 
slender, as figured, the hind tibiae with some thin setae but no 
spines; wings as figured. Abdomen with six clearly visible segments 
