100 E. T. CRESSON. 



margin of mesothorax, spot behind tegulse, line at base of scuteilum, one on 

 postseutellum and two lines on pleura, of dense white or pale ochraceous 

 pubescence; sides of metathorax with long pale hairs; scuteilum much like 

 that of mexicana but rather angular behind, longitudinally cariuate on disk, 

 the lateral teeth shorter and truncate at tip; tegulse and legs fulvo- ferrugi- 

 nous; wings dusky, darker on apical margin ; middle trochanters 

 elongate and subcylindrical when viewed laterally, spines on 

 anterior coxae rather long, acute; abdomen smooth and shining, 

 \ / finely and sparsely punctured, finely transversely impressed on 

 -*■ ^' ^ each side of second and third segments, basal margin of the first 

 and apical margin of segments 1 — 5 narrowly fringed with short white pubes- 

 cence, broadly interrupted on middle of first segment; extreme sides of first 

 and second segments ferruginous; apical segment (fig. 1) gradually narrowed 

 to tip which is depressed and acute; venter ferruginous, banded with white 

 pubescence, strongly and sparsely punctured, fifth segment very finely punc- 

 tured, elongate, acute at tip; apical segment (fig. 2) longer than the upper, 

 narrow, incurved, gradually narrowed to tip which is subacute; the apex when 

 viewed in profile much as in mexicana. Length .45 inch. 



Mab. — Mexico, (Sumichrast). One specimen. Very diflPereut from 

 all other species by the squarely produced clypeus. 



Coelioxys azteca. — 9- — Black, smooth and polished; face and cheeks 

 with short pale ochraceous pubescence, most dense on sides of face and cheeks; 

 clypeus deeply emarginate or cleft on the apical middle, giving the apex the 

 appearance of being bituberculate; a curved fringe of dark hairs on vertex; 

 on each side of ocelli a large smooth impunctured space, behind which there 

 are a few large punctures; eyes with short pubescence; mesothorax ferrugi- 

 nous, blackish on anterior middle and behind, the sides with large scattered 

 punctures; anterior margin, spot behind tegulse, band at base of scuteilum 

 and two parallel lines on pleura laterally of short dense pale ochraceous pubes- 

 cence; sides of metathorax with long pale pubescence; scuteilum large, de- 

 pressed, ferruginous, having a few large punctures, angular behind, the tip 

 rounded and slightly recurved, lateral teeth subacute, slightly divergent, the 

 tip compressed laterally; carina before tegulse prominent and subsinuate; 

 tegulse and legs fulvo-ferruginous; wings dusky on apical margin; legs and 

 abdomen as in zapoteca, except that the venter has a fine longitudinal carina 

 on the middle, especially on fifth segment, the apical segments are shaped the 

 same in both species. Length .42 inch. 



Hab. — Mexico, (Sumichrast). One specimen. The scuteilum is 

 shaped much as in tepaneca, but the apical process is not so promi- 

 nent. 



Coplioxys tepaneca. — ?. — Black, smooth and polished; head as de- 

 scribed in zapoteca except that the pubescence is more dense and longer on 

 vertex, the clypeus with short scattered erect black hairs seen better from a 

 lateral view, the middle with an impressed longitudinal line; top of head 

 smooth, with a few deep punctures on each side of ocelli; a few erect yellow- 

 ish hairs from beneath apex of clypeus; mesothorax depressed posteriorly 

 with a few punctures on the sides; pleura and metathorax clothed with 

 white pubescence; anterior and lateral margins of mesothorax narrowly, and 



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