2, PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 125 
American (Mexico and Guatemala) specimens found them to be 
superficially similar but specifically distinct. In addition to smaller 
differences, the shapes of the scutellum and hypopygium are quite 
different (cf. figs. 14 with 17, and 15 with 18); the proportions of the 
antennal segments do not coincide; and the production of the para- 
tergites of the females differ (cf. figs. 16 and 19). Thus, it is evident 
that Champion’s specimens probably were not politus but an un- 
named species that will be described below as championi. 
To establish this usage and avoid further confusion, a neotype for 
politus will be proposed and described under the specific treatment 
of that taxon. 
Key to North and Central American Species of Aneurus 
Clavus fully developed, reaching tip of scutellum; latter triangular with pointed 
BDO Ke tt obo ahd ais este yes tae wet Subgenus Aneurosoma Champion, 1898 
(eantaine a single species, dissimilis (Bergroth), 1889) 
Clavus greatly reduced to small triangle near basolateral angle of scutellum; 
apex of scutellum arcuate . .... . . . . Subgenus Aneurus Curtis, 1832 
SUBGENUS Aneurus 
1. Spiracles II to VIT lateral, visible from above, VIII terminal. 
vauriei Kormilev, 1964, Jamaica, Guadeloupe 
At least spiracles III ventral or sublateral, not visible from above . .. 2 
Spiracle III sublateral, placed close to border, though not visible from above. 
nasutus Kormilev, 1966, Guadeloupe 
Spiracle III ventral, placed far from border . . . . ir et ee 
3. Spiracles IV ventral, placed near border, not visible fom abowe! 
1. pusillus, new species, Guatemala, Panama 
Spiracles IV ventral, placed far from or close to border; when near border, 
iS) 
spiracle V sublateral but not visiblefrom above .......... 4 
4. Spiracle V lateral, visible from above . ise ion Cheek Eo ee FO 
Spiracle V ventral or sublateral, not visible from Shore a bo pels Ree EL 
5. Scutellum longer, ratio between length and width at least 2:3 6 
Scutellum very short, ratio between length and width 1:2. 
simplex Uhler, 1871, northeastern U.S. 
6. Smaller species, length less than 4.0 mm; anterior process of the head not 
reaching tip of antennal segment I; antennal segment II obovate. 
2. aibonitensis, new species, Puerto Rico 
Larger species, length about 5.0 mm; anterior process of head produced 
beyond tip of antennal segment I; antennal segment II clavate. 
septentrionalis Walker, 1873, eastern Canada 
7. Spiracle V sublateral, not visible from above. 
3. pisoniae, new species, Puerto Rico 
Spiracle V ventral, placed far from border. . .......454. +545 8 
8. Spiracle VI lateral, visiblefrom above ....... . - «..+ +» me. 
Spiracle VI ventral, not visible from above .. . ne Rone aE 
9. Head longer than width across eyes (35:33); Hntcnor nrouees of the head 
slightly produced beyond tip of antennal segment I. 
barberi Kormilev 1960, St. Lucia (Lesser Antilles) 
Head as long or shorter than width across eyes; anterior process at most 
reaching as far as tip of antennal segmentI ........... #10 
