16t PROCEEDINGS OF THE ACADEMY OF 



remaining segments togctlier broad, fusiform, smooth, shining; 

 ovipositor slender, longer than first segment, sheaths slightly 

 thickened at tips. Length 5^ lines. 

 Orizaba. 



& Christolia calcarata, n. sp. 



% . LJlack, opaque, subsericeous ; face, anterior orbits, cl,ypeus, 

 metathoracic tubercles and tibial spurs, white ; wings hyaline, 

 faintly dusky at tips, nervures and stigma Ijlack ; anterior legs 

 palish in front; apex of first obscurel}^ and the fifth and following 

 abdomiual segments margined posteriorly with yellowish. Form 

 same as that of nubecula, with more slender abdomen ; antennae 

 nearly as long as body, filiform, slenderer at tips : raesothorax finely 

 and densely punctured; scutellum convex, shining, sides subcari- 

 nate, lateral region longitudinally striated ; metathorax subex- 

 cavate behind, reticulated, the lateral tubercles short and very 

 obtuse; areolet as in nubecula; abdomen smooth and polished, 

 strongly clavate, first segment long and slender, dilated at apex, 

 stigmatic tubercles prominent. Length 4-5 lines. 



Orizaba. (Sumichrast, No. Gl.) 



3. Cliristolia zapotecus, n. sp. 



9. Black ; sides and middle of face, most of clypeus, labrnm, 

 anterior orbits, cheeks, annulus on antenna} interrupted beneath, 

 tegulte, spot on each side in front, spot beneath, two short discal 

 lines on mesothorax, scutellum, two obli(:[ue lines in front, s[)ot on 

 postscutellum, spot behind base of wings, two roinid spots on 

 metathorax covering tubercles, round spot on each flank, an ob- 

 lique mark on each side of pleura hooked posteriorly, coxic, sjiot 

 on middle of first abdomiual segment and apical margin of all the 

 segments, white or 3'ellowish ; wings hyaline, dusky at ajiical mar- 

 gins, nervures black ; legs strongly 3'ellowish, posterior coxre at 

 base beneath, and short line or spot at apex above, their trochan- 

 ters, all the femora above, apex of posterior i)air and of all the 

 tarsi, black. Form very robust, compact, opaque; mesothorax 

 densel}'' sculptured; metathorax broad, sloping rapidly beiiind, 

 reticulated, tubercles ver3'^ short, robust and blunt; legs long and 

 robust ; abdomen smootii ; areolet small, subquadrate, open. 

 Length 6 lines. 



%. Dififers from 9 as follows: Antenna? entirely black; poste- 

 rior coxcXJ beneath and apex above, their trochanters, femora, apex 



