128 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 113 
Gonycentrum socium, new species 
FIGURE 3 
Description: Small, obovate, stramineous brown, with head and 
patches of fuscous on pronotum and elytra as depicted in figure 3; 
bucculae fuscous, with inferior margin testaceous; body beneath 
blackish fuscous. Labium brown, with laminae of sternal sulcus 
pale testaceous. Antennae fuscous-brown, the fourth segment black. 
Legs brownish testaceous, tips of tarsi dark fuscous. Length 2.40 
mm.; width of male 1.20 mm., of female 1.45 mm. 
Head long, broad, subdepressed, punctate, armed with two pairs of 
moderately long, suberect, stout, blunt spines in front of eyes; eyes 
moderately large, widely separated from each other; antenniferous 
tubercles short, concave within, with front margin rounded; bucculae 
wide, long, open in front, uniseriate in front, then becoming wider 
and biseriate posteriorly. Antennae slender, smooth, with first two 
segments short, moderately incrassate, apices of second segment not 
attaining tip of head; segmental measurements: I, 10; II, 6; III, 52; 
IV, 14. Legs rather short, femora only slightly incrassate. Hypo- 
costal lamina narrow, uniseriate. 
Pronotum depressed, reticulately punctate, with hind margin sub- 
rounded, tricarinate; all carinae long, percurrent, uniseriate; lateral 
carinae parallel, less elevated than median carina, interrupted behind 
collar; calli impressed, impunctate; paranota narrow, turned obliquely 
upward, mostly uniseriate, biseriate opposite calli. 
Elytra distinctly convex, much wider in female than male, with 
clavus and discoidal areas completely fused; boundary vein separating 
discoidal, subcostal, and sutural areas distinctly raised; boundary 
vein delimiting costal and subcostal areas poorly developed; costal 
area narrow, mostly uniseriate, biseriate in apical third; subcostal 
area wide, sloping gently convexly downward, wider than discoidal 
area, usually with one or two, raised, transverse adventitious veins; 
discoidal area very long, about six-sevenths as long as elytra, with 
two or three adventitious cross veins, mostly five or six areolae deep. 
Scutellum small, exposed. Macropterous form unknown. Ostiole 
and ostiolar sulcus of metathoracic scent glands indistinct. 
Types: Holotype (male), allotype (female), and male and female 
paratypes (from Hacker collection), Launceston, Tasmania, Aus- 
tralia, May 5, 1925, USNM 65111. 
ReMARKS: The allotype of G. sociwm is illustrated in figure 3. 
This species resembles G: tinsdalei Hacker of Australia in general 
aspect, and can be separated from it by shorter antennae and the 
narrower paranota and costal areas. In tinsdalei the costal area is 
