136 PROCEEDINGS OF THE ACADEMY OF 



pair, beneath "vvhicb at base are two elongate spots, black; antennae 

 long, slender, black, with a broad white annulus near apex, scape 

 white beneath ; wings hyaline, iridescent, nervures black; areolet 

 rather small, 5-angular; legs hone3'-3'ellow, coxa^ white, tips of 

 four anterior tarsi blackish, posterior pair white, honey -yellow at 

 extreme base and black at apex; abdomen black shining, base 

 rather strongly arcuate, first segment white with a broad median 

 black band, apical margins of remaining segments rather broadly 

 white. Length 4^ lines. 



Orizaba. Basil}' recognized by the cousiiicuous strongly arcu- 

 ated black baud on metathorax. 



6. Cryptus transversus, n. sp. 



9. White; spot on vertex covering ocelli, most of occiput, 

 apex of mandibles, antenna? except scape beneath and broad an- 

 nulus on flagellurn, posterior margin of prothorax, central spot 

 above, mesothorax except central spot, lateral region of scutellum, 

 narrow transverse band on middle of metathorax directed ob- 

 liquely backward on the flanks, slender line on posterior coxns 

 furcate at tip, apex of tarsi, spot on middle of first abdominal 

 segment, remaining segments except broad apical margins, and 

 dot on each basal corner of second segment, black ; wings hyaline, 

 extreme apical margin dusk}' ; legs except coxfe bright yellow, 

 posterior tarsi except tips white. Robust, opaque ; metathorax 

 smooth, rounded, with a single transverse carina bordering the 

 posterior black band; areolet small, 5-angular; abdomen broad, 

 depressed ; legs subrobust. Length 5 lines. 



Mirador. This is closely allied to arcuatus, but distinguished 

 at once by the band on metathorax being transverse. 



7. Cryptus angulatus, n. sp. 



9. Yellowish-white; tips of mandibles, spot on middle of ver- 

 tex covering ocelli and connected with two oblique lines on occiput, 

 disk of prothorax, sutures of mesothorax, scutellar region, trans- 

 verse sutural line immediately beneath wings, sutural line at base 

 of metathorax, a slender oblique one on each side near tubercles, 

 and a short angular mark on disk connected medially with base, 

 black; antenn.'e black, with a rather broad white annulus beyond 

 middle, scape white beneath ; mesotliorax ferruginous or brown, 

 wiLli a stripe on middle division and line over teguhu, yellowish; 

 metatliorax with a short transverse cariniform tubercle on each side 



