396 PROCEEDINGS OF THE ACADEMY OF 



segment with a fovea on each side at base; ovipositor not half the 

 length of the abdomen. Length 6-7| lines. 



Orizaba; Cordova; Mirador. (Sumichrast, No. 10.) Common. 

 The mesothorax has sometimes a black line over the tegnla?, and 

 the abdomen is sometimes more or less fuscous at tip ; this latter 

 is doubtless owing to discoloration, 



2. Theronia tolteca, n. sp. 



% 9. Honej'-yellow, smooth and shining; face, thorax laterally 

 and beneath, and four anterior coxae lemon-yellow ; antenna?, ex- 

 cept scape and posterior tarsi, black ; wings hyaline, with fuliginous 

 spot at tip of marginal cell, nervures and stigma black; apex of 

 abdomen more or less dusky ; form long, slender; antenna? as long 

 as body, slender, filiform, joints short, the sutures not very dis- 

 tinct ; mesothorax trilobate in front ; metathorax with a sharply- 

 defined arcuate carina across the middle ; wings ample ; legsratlier 

 robust ; abdomen same shape in both sexes, long, slender, and 

 clavate, subpetiolate, first segment more than twice longer than 

 wide, sides parallel, surface above even, smooth, and polished ; 

 ovipositor of 9 rather longer than first segment of abdomen. 

 Length 5-6i lines. 



Orizaba. (Sumichrast, No. 7T.) 



3. Theronia mellosa, n. sp. 



% 9. Honej^ -yellow, smooth and shining ; face, thorax laterally 

 and beneath, and base of four anterior legs, more conspicuous in 

 % , lemon-ja^llow ; tips of mandibles, antennje except base beneath, 

 sometimes the basal margin of metathorax, tii)s of posterior tarsi 

 and the ovipositor black; wings hyaline, with a rather small, 

 rounded, black spot at tip of marginal cell, nervures and stigma 

 black ; in some specimens the second, third, and fourth segments 

 of abdomen have blackish stains at base; form more slender than 

 usual; antenna? as long as body, filiform, joint 3 longer than 4, 

 sutures not very distinct; mesothorax su])trilobed in front; meta- 

 thorax smooth, polished, Avith a sharply-defined arcuate carina 

 across the middle; wings ample; legs slender, posterior pair 

 robust; abdomen subpetiolate, smooth, polished, fusiform or cla- 

 vate in 9, long, cylindrical in t , first segment more than twice 

 longer than broad, sometimes sliglitly narrowed at base, with two 

 central longitudinal carinae ; ovipositor slender, longer than first 

 segment of abdomen. Length 4-5 lines. 



Orizaba; Cordova. 



