NATURAL SCIENCES OF PniLADELPHIA. 397 



4. Theronia Tacubaya, n. sp. 



S ?. Lemon-yellow, shining; tips of mandibles, spot on each 

 side of ocelli, posterior margin of occiput, antenna above, three 

 lines on mesothorax, sutures of thorax, middle or whole of trans- 

 verse carina on metathorax, sometimes one or two lines down the 

 middle of posterior slope, a line on posterior coxpe beliind, some- 

 times obsolete, a line on all the femora, and sometimes on tibite 

 within, posterior tarsi of S, three lines on disk of first abdominal 

 segment, sometimes confluent, and broad basal margins of remaining 

 segments, narrow on apical ones, black or brown-black ; antennae 

 beneath reddish-brown, paler at base, scape yellow beneath, the 

 extreme apical joint fulvous ; wings yellowish-hyaline, with a 

 golden reflection, apical margins faintly dusky ; nervures and 

 stigma fulvous ; posterior tibia? of Z and tarsi of 9 more or less 

 dusky ; ovipositor brownish, paler at base ; antenna? about as long 

 as body, filiform, basal joints short and indistinctly defined ; meso- 

 thorax slightly trilobed, more prominently so in "J, ; metathorax 

 rounded, sloping gradually to apex, basal middle sulcate with a 

 8trongl3'-developed transverse, somewhat arcuate, acute carina on 

 disk, sometimes abbreviated ; areolet quadrangular, oblique ; legs 

 subrobust ; abdomen oblong ovate in 9 , longer and narrower in % , 

 subsessile, subdepressed ; first segment twice longer than wide, 

 sides parallel, flattened above, with two elevated longitudinal 

 medial lines, less developed in % ; ovipositor of 9 nearly as long 

 as abdomen. Length 4-6 lilies. 



Orizaba; Cordova. (Sumichrast, No. 65.) Common. Varies 

 much in size, and the markings vary from pale-brown to black. 



5. Theronia consimilis. 



Pimpla consimilis, Cress., Proc. Ent. Soc. Phil., iv. p. 37. 



Orizaba; Cordova; Mirador. (Sumichrast, Nos. 49, 64.) This 

 common species occurs also in Cuba, and is closely allied to Tacu- 

 baya; it is, however, more shining, with the metathorax always 

 immaculate except basal suture, and the wings are differently 

 colored, having a conspicuous dark spot at tip of marginal cell. 

 It varies in length from 3^-5^ lines. 



Genus PIMPLA, Fabr. 

 1. Fimpla caeruleata, n. sp. 



9. Brilliant steel-blue, changing to purple in certain lights; 

 antennae, tarsi, and sheaths of ovipositor dull black ; tips of an- 



