812 N. C. AGR. EXP. STA. BUL. 239 
112. SCHISTOGONALIA, NEw GENus 
Ficures 657, 658 
Type-species: Schistogonalia prava, n. sp. 
Length 8.0-9.9 mm. 
Head weakly produced with anterior margin broadly rounded in dorsal 
view, median length of crown from four-tenths to slightly less than six-tenths 
interocular width, and from slightly less than three-tenths to slightly more 
than one-third transocular width, without a carina at transition from crown to 
face, ocelli located on a line between anterior eye angles, each equidistant 
from median line of crown and adjacent anterior eye angle, disk with a 
shallow transverse concavity across ocelli, surface of crown weakly punctate, 
lateral clypeal sutures extending onto crown and almost attaining ocelli; an- 
tennal ledges not protuberant, in lateral view with their anterior margins ob- 
lique and convex; clypeus slightly flattened medially, muscle impressions dis- 
tinct or not, clypellus with contour of its lower portion slightly more nearly 
horizontal than profile of remainder of face. 
Thorax with pronotal width greater than transocular width of head, lateral 
margins convergent anteriorly, dorsopleural carinae complete, posterior 
margin shallowly concave, disk weakly transversely rugulose, posterior margin 
concave; scutellum transversely rugose or not behind transverse sulcus. Fore- 
wing without a membrane, veins obscure. Hindleg with femoral setal formula 
2:1:1; length of first tarsomere greater than combined length of two more dis- 
tal tarsomeres, and with two parallel rows of small setae on plantar surface. 
Male genitalia: Pygofer moderately produced, apex variable interspeci- 
fically, macrosetae varying interspecifically from few to many, located on 
posterior half of disk, pygofer with or without processes. Plates slender, 
triangular, narrowly rounded apically, extending posteriorly as far as pygofer 
apex, each with a row of macrosetae. Style not extending posteriorly beyond 
apex of connective, narrow and truncate apically, without a preapical lobe. 
Connective Y-shaped; aedeagus with shaft curved dorsally through 90°, with 
a single unilateral paraphysis closely associated with it at its base, more uni- 
formly curved than shaft, and almost attaining apex of shaft. 
Female (unknown for S. rhypha, n. sp.) abdominal sternum VII moderately 
produced, posterior margin tapered abruptly and obtusangular at apex (not 
illustrated, much as in Borogonalia impressifrons (Signoret), figs. 8512, p, but 
blunter and without posterolateral concavities). Ovipositor with second 
valvulae (fig. 657k, m, p) much as in impressifrons but with primary teeth 
abruptly more closely set at apex. Pygofer as in impressifrons but with apex 
more narrowly rounded. 
Schistogonalia, new genus, occurs in Costa Rica and Panama. In spite of the 
similarity of the females to Borogonalia, new genus, it is probably more nearly 
related to Nielsonia, new genus, than to Borogonalia. 
One specimen of S. prava, n. sp., was collected on Phoebe tondugn Mez. 
SPECIES OF SCHISTOGONALIA 
prava, n. sp. Costa Rica. 
thypha, n. sp. Panama. 
