12 BULLETIN 31, UNITED STATES NATIONAL MUSEUM. 



vritliluteous colored pile. Tegulae luteous colored. Wings brownish. — 

 Translation. 



Macquart's description was based upon the type specimens of Fabri- 

 cius, at Bosc's museum, Paris. 



Microdon rufipes. 



Aphritis rufipes Macquart, Dipt. Esot., ii, 2, 11, 1; pi. ii, fig. 3. 

 Microdon rufipes Osteu Sacken, Catalogue, 119. 



Habitat. — Philadelphia (Macq.)- 



Thorace nigro-viridi, ])urpuro-lineata. Abdomine nigro-cceruleo, al- 

 bido tomentoso. Pedibus testaceis. Long, e*"™. 



Face d'uu vert noiratre, a polls jaunatres. Front d'un bleu noiratre 

 a polls jaunatres ; uu sillon transversal. Autennes: premier article 

 noiratre; les deux autres testaces. Yeux pen veins. Thorax k quatre 

 lignes pourpres sur un fond vert metallique noiratre; ecusson bleu; 

 pointes couvertes de polls blauchatres. Abdomen ovale, d'un bleu 

 violet fonc6 ; deiixi^me segment a baude transversale de duvet blanch- 

 atre au bord posterieur, interrompue.au milieu et s'elargissant vers les 

 cotes; troisieme a bande longitudinale de semblable duvet, ^.galement 

 interrompue et se reunissant a I'.extr^mite. Pieds d'un fauve testac6; 

 base des cuisse noire. Balanciers jaunatres. Ailes a base et bord ex- 

 terieurs jaunatres; toutes les nervures bord^es de brunatre; premiere 

 cellule post^rieure terminee en angle et appendiculee. — Macquart. 



Face of a blackish green, with yellowish jiile. Front blackish blue, 

 with yellow pile, with a transverse groove. Antennae : first joint black- 

 ish ; the two others testaceous. Eyes thinly pilose. Thorax with 

 four purple lines on the metallic blackish green grountl color ; scutel- 

 lum blue ; points covered with whitish pile. Abdomen oval, of a dark 

 violet blue; second segment with a band of whitish pile on the poste- 

 rior border, interrupted in the middle and enlarged at the sides; third 

 segment with a longitudinal stripe of similar pile equally interrupted 

 and reunited at the extremity. Legs reddish colored, base of femora 

 black. Halteres yellowish. Wings at base and exterior front Dorder 

 yellowish; all the veins bordered with brownish; first posterior cell 

 terminating in an angle and appendiculate. — Translation. 



The figure represents the last section of the fourth vein as straight 

 and rectangular, the posterior angle a little acute and appendiculate. 



ADDITIONAL NORTH AMERICAN SPECIES. 



Microdon Inaequalis Loew, Centnr., vii, 70. — Ciiba. 

 Microdon laetus Loew, Centnr., v. 46. — Cnba. 



Microdon gracilis Bigot, Atmales Soc. Ent. de France, 188:3, 320. — Mexico. 

 \^Chiimophila splendena Macquart, Hist. Nat. Dipt., i,48(), pi. xi, fig. 3; Dipt. Exot., ii, 2, 

 10, 2, pi. i, fig. 2.— Phila. 



'•Mr. Bigot, in whose possession the typical si)ecimen of Macquart's 

 description now is, makes the following statement about it (Aunales 

 Soc. Ent. de France, 185S, p. 590) : 'The head of this specimen is glued 



