NATURAL SCIENCES OF PHILADELPHIA. 16Y 



lateral region longitudinally, somewhat obliquely striated ; meta- 

 thorax clothed with a silvery pubescence, more dense on sides and 

 apex, basal tliird almost smooth, bounded posteriorly by a sharp 

 transverse carina which is angulate on the disk, the remaining 

 portion transversel}', irregularlj- striated, subtruncate behind with 

 a subarcuate carina on each side on the verge of the truncation ; 

 luetathoracic stigmatse large and ovate ; wing nervures black, the 

 areolet, about the buUse and at tip of marginal cell dusky ; areolet 

 subquadrate, closed ; legs long and slender, claws sim})le ; abdo- 

 men bej'ond first segment subfusiform, shining, convex, tip slightly 

 compressed ; first segment two-thircls as long as the remainder of 

 the abdomen, slender at base, very slightly broader at apex ; ovi- 

 positor at least half the length of the abdomen. Length 6-1^ 

 lines. 



%. Face, anterior legs in front, intermediate coxre and tro- 

 chanters beneath, generally a spot on each side of pleura beneath, 

 and a short line beneath teguhv, white ; posterior femora more or 

 less black at apex, their tibire generally pale at base ; otherwise 

 same coloration as 9, with the form much more slender, especially 

 of antennae, legs, and abdomen. Length 5-6 lines. 



Orizaba; Cordova. (Sumichrast, No. 1.) Common. 



2. Cryptanura delecta, n. sp. 



5. Black; face, mouth, cheeks, anterior orbits, annulus on 

 antennae, collar, tegulse, line before, spot beneath, scutellum, dot 

 on postscutellum, posterior tibiae except base and apex, and apical 

 margins of abdominal segments, white or whitish ; pleura, meta- 

 thorax except base above, legs and base of first abdominal seg- 

 ment, ferruginous ; wings h3'aline, nervures black ; tips of posterior 

 femora, their tibiae and base and apex of their tarsi, black. Form 

 elongate, slender; mesothorax finely sculptured; metathorax 

 transversely striated, smooth at base, the posterior transverse 

 carina obsolete centrally and prominent laterally ; abdomen nar- 

 row, smooth, and shining, with long, slender first segment which 

 is tuberculate on each side behind middle. Length 7^ lines. 



Orizaba. (Sumichrast, No. 59.) 



3. Cryptanura acolhua, n. sp. 



?. Black; labrura and palpi 3'ellow; mandibles piceous ; an 

 incomplete white annulus on middle of antennae, and a white dot 

 on tip of scutellum; wings as in SumicJi?'asli ; four anterior legs 



