136 E. T. CRESSON. 



Hah. — Mexico, (Sumichrast). Six specimens. The pubescence of 

 the legs is entirely black. 



Tetrapedia apicalis. — J.— Very much like moesta 9. but differs as 

 follows; the face above antennae is slightly prominent medially and punc- 

 tured ; the mesothorax has three finely impressed longitudinal lines on anterior 

 middle; the pubescence on sides of metathorax is more or less pale; the wings 

 are more broadly whitish-hyaline at tip, the second subraarginal cell receiving 

 the recurrent nervure at the tip; the spurs of posterior tibise are black; the 

 abdomen is sometimes rufo-testaceous at base, and the fringe at apex of fifth 

 dorsal segment is tipped with cinereous. Length .30 inch. 



Hah. — Mexico, (Sumichrast). Three specimens. 



Tets°apedia terminalis. — 9- — Very much like apicalis but differs as 

 follows; the wings are whitish-hyaline beyond the second submarginal cell, 

 the third more narrowed towards the marginal, the abdomen shorter and 

 broader, fulvo-testaceous at base, the two apical segments above and beneath 

 fringed with fulvous pubescence. Length .30 inch. 



Hth. — Mexico, (Sumichrast). One specimen. 



Tetrapedia fraterna. — % . — Black, shining, the pubescence black, that 

 on the face, labrum and cheeks silvery-white; narrow orbital line on face, one 

 on lower posterior orbits, clypeus, transverse line above, labrum, mandibles 

 except tips, scape beneath, line on collar, dot on tegulse anteriorly, dot on four 

 anterior knees, and tips of tarsi, all yellowish-white; face above antennae some- 

 what prominent medially and punctured, clypeus and middle of face beneath 

 antennae with large, rather deep punctures; flagellum dull testaceous beneath ; 

 mesothorax smooth and shining; wings fuscous, apex broadly hyaline, second 

 submarginal cell receiving the recurrent nervure between middle and apex; 

 legs clothed with black pubescence, basal joint of tarsi broad and fringed 

 behind with rather long dense black pubescence, tibial spurs slender, black; 

 abdomen piceous, smooth and polished, the pubescence at apex more or less 

 intermixed with pale; venter with pubescence pale, the second and third seg- 

 ments more or less marked with whitish. Length .30 inch. 



Hah. — Mexico, (Sumichrast). Two specimens. 



Tetrapedia calcarata. — 9- — Black, the abdomen flavo- testaceous, 

 shining; head and thorax sometimes more or less varied with brown; sides of 

 face and cheeks covered with a rather dense silvery sericeous pile; antennae 

 dull ferruginous beneath ; metathorax and pleura with a fine silvery sericeous 

 pile; on each extreme side of base of scutellum a small pale spot; tegulae pice- 

 ous; wings yellowish subhyaline, nervures and stigma pale brown, second sub- 

 marginal cell receiving the recurrent nervure near the tip: legs rufo-fuscous, 

 the pubescence black, tibial spurs slender, white; abdomen sometimes slightly 

 obfuscated or discolored towards apex, the pubescence pale, with a slight ad- 

 mixture of black on apical segments. Length .35 inch. 



'^ . — Sides of face, more or less, narrow posterior orbits, clypeus except some- 

 times the base, generally a dot above, labrum, mandibles except tips, and line on 

 scape beneath, yellowish-white; legs pale brown, simple, the pubescence black, 

 tibial spurs white; abdomen colored as in 9 • Length .30 — .36 inch. 



Hah. — Mexico, (Sumichrast). Ten specimens. 



