NO. 1487. NORTH AMERICAN DIGGER WASPS— FERNALD. 359 



Lepeletier's name "tibialis" being preoccupied, and no available 

 synon3'm existing, it is necessary to propose a new name for this insect 

 and I have selected '''' auripes''^ for this purpose. 



This insect is pictured as figure 17, Plate VII, in the Insect Book. 



CHLORION (ISODONTIA) HARRISI, new name. 



Sphex apical is Harris, Cat. An. Mass., 2d ed., 1835, p. 588 (nomen nudum). 



? Sphex philadt'lphica Lepeletier, Hist. Nat. Ins. Hym., HI, 1845, p. 340. 



II Sphex apicalis Smith, Cat. Hym. Brit. Mus., IV, 1856, p. 262. 



Sphex apicaUs Saussure, Reise d. Novara, Hym., 1867, p. 38. 



Sphex apicalis var. mexicana Saussure, Reise d. Novara, Hym., 1867, p. 38. 



SpJtex apicalis Taschenberg, Zeits. f. d. ges. Naturw., XXXIV, 1869, p. 414. 



Isodoniia philadelphica Patton, Proc. Bos. Soc. Nat. Hist., XX, 1880, p. 380. 



Sphex apicalis Bru-^er, Rept. U. S. Dept. Agr., 1884, 1885, p. 400. 



Sjjh ex apicalis Cameros, Biol. Centr.-Amer., Hym., II, 1889, p. 35. 



Sphex (Isodontia) jjliiladtlpliicus Kohl, Ann. Natur. Hofmns. Wien, V, 1890, 



p. 380. 

 Isodoniia philadelp]iica, Ashmead, Ins. Life, VII, 1894, p. 241. 

 Isodontia apicalis H. Fernald, Can. p]nt., XXXV, 1903, p. 269. 

 Isodontia philadelphicus Jo'SES, Ent News, XV, 1904, p. 17, pi. iii. 



Black with brown and gray hairs; wings more or less fuliginous 

 with violet reflection; pubescence silvery white. 



Female. — Head quite large, quadrangular from above; clj'peus 

 arched laterally, its anterior margin with rounded corners, slightl}' 

 emarginate and with two teeth in the middle, separated by a rounded, 

 rather shallow notch; surface silvery-white pubescent and quite thickly 

 covered with long, black and brown hairs; with a trace of a median 

 carina on the dorsal part of the plate; frons with a frontal suture; 

 silvery- white pu))escent to aliove the insertions of the antenn;e; rather 

 sparsely, tinely punctured and bearing long, black and brown hairs 

 not t(uite as stout or numerous as on the clypeus; ocelli located in a 

 curve rather than mai'king the corners of a triangle, the lateral ones 

 nearer each other than they are to the eyes; vertex sparsely punc- 

 tured; cheeks rather narrow, less than half the width of the eye, 

 narrowing gnulually below; with whitish sericeous showing faintlv 

 just behind the eye; sparsel}^ punctured and with long, grayish hairs; 

 anterior margins of the eyes slightly converging downward; antennae 

 ))lack, slightly grayish sericeous in certain lights; scape quite thickly 

 clothed with short hairs; first segment of the filament the longest; 

 mandibles short, black, three toothed, the teeth nearly equal in length, 

 with a faint brownish tinge between the bases of the teeth and the 

 articulation, witli the head. 



Thorax. — Neck short, ])road; anterior face of the collar rising 

 sharply and at right angles lo the neck; this face rather flat from side 

 to side, sparsely punctured and at the narrow dorsal edge faintly 

 whitish sericeous; posterior face nearly vertical, ([uite closely 

 appressed against the mesonotum; sides of the collar sparsely punct- 



