NO. 1487. NORTH AMERICAN DIGGER WASPS— FERNA LI). 377 



I It is possible that Cresson's suspicion that this insect will prove to 

 ;be a subspecies of lautum, may 3^et prove to be correct, in which case 

 hahemoi) Cresson will become the specific name, while lautum will 

 become that of the subspecies with the red abdomen. This suspicion 

 is still far from being- proved, however. 



It should be noted here that the insect identified by Cresson as 

 hahena Say, and goin^ by this name in many collections, is quite dif- 

 ferent from the real habenuin and does not agree with Say's descrip- 

 tion in many ways. It is really C. sinniger Kohl. 



CHLORION (PROTEROSPHEX) TEPANECUM (Saussure). 



Sphex Ifpanecus Saussure, Reise d. Novara, Hym., 1867, p. 41, pi. ii, fig. 23. 

 Sphex mexicana Taschenberg, Zeits. f. d. ges. Naturw., XXXI V\ 1869, p. 416. 

 Sphex tepaneca Cameron, Biol. Centr.-Amer., Hym., 11, 1889, p. 33. 

 Sp}iex mexicana Camerots!, Biol. Centr.-Amer., Hym., II, 1889, p. 34. 

 / Sphex tepanecus Kohl, Ann. natur. Hofmus. Wien, V, 1890, p. 401. 



Robust, black except on the basal half of the abdomen and on parts 

 of the femora; wings hyaline with a strong yellowish tinge to the outer 

 ends of the cells, the outer margins somewhat fuliginous; without 

 pubescence except on the head. 



Female. — Unknown. 



2[ale. — Head quite broad, somewhat quadrangular from above, but 

 with the cheeks retreating more from the corners of the quadrangle than 

 do the eyes; entire clypeus and sides of the frons to above the antennje 

 covered with silvery pubescence, which is very smooth and satin-like 

 on the clypeus, along whose sides are numerous long black hairs; its 

 anterior margin rather rounded truncate, black, not reflexed; on the 

 sides of the frons the black hairs are longer and more abundant, as 

 well as along the middle line of this plate; the remainder black seri- 

 ceous; lateral ocelli about equidistant from the eyes and from each 

 other; vertex, occiput, and cheeks V)lack sericeous, the last two with 

 numerous long black hairs, particularly long and abundant below; 

 inner borders of the eyes about parallel; antenna black, the outer part 

 rather brownish sericeous; scape with a brownish tinge at the outer 

 end; the first segment of the filament black; relative length of the 

 filament segments 4^5, 2^, i^, ^^\ mandibles at base and on the teeth 

 to their bases black; elsewhere ferruginou:^, with a few short longi- 

 tudinal rows of strife containing deeper punctures; two-toothed, the 

 terminal tooth nearly reaching the base of the other mandible; with 

 scattered long black hairs on the hinder face; head not as broad as 

 the distance between the outer edges of the teguhe. 



Thorax. — Densely clothed with quite short, erect, black hairs; 

 anterior face of the collar almost vertical, the posterior face closely 

 appressed against the mesonotum; with many quite long, black hairs; 

 dorsal edge of the collar somewhat flattened in the middle; prothoracic 

 lobe with quite a thick fringe of short brown hairs behind; median 



