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PROCEEDINGS OF THE NATIONAL MUSEUM 



VOL. 88 



The structures mentioned in the following keys and descriptions 

 may be located by referring to figures 6, 7, a, 10, 5, and 13, h. Figure 6 

 shows those structures visible from the lateral aspect of the entire 

 body, figure 7, «, the structures and areas visible from the anterior 

 aspect of the head, and figure 10, &, the sclerites and areas of the dor- 

 sum of the thorax. Figure 13, 5, is the posterior aspect of a propo- 

 deum and shows the location of the spiracles on that segment. These 

 spiracles are somewhat difficult to locate on many specimens. 



In order to see the characters used in the keys and descriptions in 

 this paper, it is necessary to use a microscope providing magnifica- 

 tions of 50 to 100 diameters and a very strong light. All measure- 

 ments used have been made with a disk micrometer. Definite meas- 

 urements in millimeters are not usable in the Chalcidini, because of 

 the wide range in size of specimens to be encountered within a 

 species. Comparative measurements of two structures on the same 

 specimen are, however, fairly reliable. Several hundred measure- 

 ments made on specimens of two of the commonest species, Spilochal- 

 cis mariae (Riley) and ;S'. side (Walker), indicate that variations of 

 10 to 15 percent in these comparative measurements are to be ex- 

 pected. The measurements given in the following descriptions are, 

 therefore, stated in terms that seem broad enough to encompass the 

 actual or probable variation. In the descriptions the term "slightly" 

 is used where structures are visibly not the same size, but measure- 

 ments have shown them to differ by less than 10 percent. 



FiGUKE 6. — Chalcis sispes (Linnaeus) : Lateral aspect. 



■AiP axilla 



C costal vein 



C-^ compound eye 



Cer cercus 



CI clypeus 



Ou cubital vein 



Ep epipygium 



FOS frontogenal suture 



Fl flagellum 



Hy hypopygium 



^ medial vein 



MC mesocoxa 



Md mandible 



MEp mesoepimeron 



MEps mesoepisternum 



ifF mesofemur 



MPs mesopraescutum 



Ms mesoscutum 



MSc mesoscutellum 



MtC metacoxa 



MtEps metepisternum 



MtF . metafemur 



MtN metanotum 



MtT metatrochanter 



MtTi ,. metatibia 



MtW hindwing 



Mv marginal vein 



Mw forewing 



Oc ocellus 



P pedicel 



Pa parapsidal furrow 



PMv postmarginal vein 



Pn pronotum 



Pr propodeum 



PrP prepectus 



Pt petiole 



r-m radio-medial cross vein 



RS ring segment 



Rs radial sector vein 



Rsi anterior branch of 



radial sector vein 



So subcostal vein 



Sea antennal scape 



8h ovipositor sheath 



8Mv submarginal vein 



8p tibial spur 



St , stigmal vein 



Str strigilis 



Tg tegula 



