4 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 125 
(o 14:10, 9 15:10.5); segment I barrel shaped; II obovate, much 
smaller and narrower; III and IV cylindrical. Relative lengths of 
antennal segments I to IV: &@ 3:3:2.5:5.5, 93.5:2.75:2.75:6. Labium 
very short, reaching middle of head. 
Pronotum less than half as long as maximum width (o 9:19.5, 
2 8.5:20). Collar tiny, sinuate in front. Anterolateral angles evenly 
rounded, produced neither forward, nor sideways. Lateral borders of 
forelobe parallel; humeri parallel, strongly converging anteriorly. 
Hind border sinuate in the middle. Foredisc with two (1+1) bean- 
shaped callosities, and a few small callosities laterad. Hind disc 
extremely finely punctured, with an arcuate, slightly raised, trans- 
verse, longitudinally striate strip. 
Scutellum almost as long as basal width (co 10:11, ? 10:11), 
evenly arcuate apically; disc finely, concentrically striate. 
Hemelytra reaching to the middle of tergum VII in both sexes; 
corium extended along basal third of scutellum. 
Abdomen elongate ovate, longer than maximum width across seg- 
ment IV (@ 40.5:25, 9 40.5:25). Connexivum narrow; PE-angles 
not protruding; PE-VII rounded in the male, angularly rounded in 
the female. Paratergites (7) moderately large, subtruncate apically, 
reaching apical fourth of hypopygium; latter moderately large, as 
long as maximum width (5:5). Paratergites (9) triangular, very short, 
produced almost as far as segment IX; latter truncate posteriorly. 
Spiracles IT lateral, III ventral, IV ventral placed nearer to border, 
V to VII lateral, VIII terminal. 
Cotor.— Yellow brown or pale testaceous, partially testaceous. 
MEASUREMENTs.—Total length: @ 2.85, 9 2.85 mm; width of pro- 
notum: o 0.78, 2 0.80 mm; width of abdomen: o 1.00, 2 1.00 mm. 
Honotypr.—o’, Guatemala, Cacao, Trece Aguas, Alta v. Paz; 
Schwarz and Barber coll. (USNM type 69794). 
ALLOTYPE.—@, collected with holotype; in the same collection. 
PARATYPES.—2 oo’ and 4 99, Panama, C.Z., Bohio; Schwarz 
coll., 6-9.II.; 1 9, Porto Bello; Schwarz coll., 26.II; in the same and 
Kormilev collections. 
Remarks.—Aneurus pusillus is the smallest known American 
species of Aneurus. It belongs to the group with evenly rounded 
scutellum and relatively large hypopygium. Its relation to other 
species is seen from the key. 
2. Aneurus aibonitensis, new species 
Figures 7, 8 
FrmaLe.—Hlongate ovate; head, pronotum, and lateral borders of 
abdomen, densely and relatively roughly punctured; lateral borders 
of pronotum finely serrate. 
