■210 BULLEriN .ll, UNITED STATES NATIONAL MUSEUM. 



his most typical species. His detinition of the genus is as follows: 

 •• Coi-ps epais, vein. Face proloDg(:!'e infereurement, Ji legere piooin- 

 inence. Front etroit, non lineaire S . Anteiines inseiees sur nne saillie 

 du front, premiere article un pen allonge, troisieme plus large qne long. 

 Jambes posterieures arquees et comprim^es. Ailes ecart^es, premiere 

 cellule posterieure a base oblique." 



TABLE OF SPECIES. 



CKIORHINA. 



1. — Legs wholly black; abdonieu thickly black pilose in the middle; tip of fourth 



vein beut inwards nigripes 



Legs in part red or yellow 2 



2. — First joint of autennaj only a little elongate; tibiae, except a suaall ring, and the 



tarsi, red verbosa 



First joint of antennai considerably elongate; proboscis long; base of tibia* yel- 

 low ; tarsi in large part black lupina 



CYXORHINA. 



1. — Face without yellow produced somewhat forwards below% second segment of ab- 

 domen broadly and third and fourth narrowly on the sides yellow, 



umbratilis 



Face in large part yellow 2 



2. — Face with a median shining black striiie ; second segment of th<^ alxlomeu on the 

 sides, continned more narrowly on the third yellow . . . intersistens 



Face yellow, without a median black stripe 3 



3.— Abdomen wholly black arniillata, nigra 



Abdomen with yellow 4 



4. — Front of female wholly yellow; abdomen black, except a large part of the fourth 

 and the whole of the tifth segments, which are bright orange yellow 



aualis 



Front of female black on npperpart; abdomen with yellow s]iots or bands . . 5 



5. — Abdomen with two to four pairs of yellow side spots, touching the lateral margins 



humeralis, uotata 

 Abdomen with cross-bands, the first interrupted, the others entire . . scitula 



Criorhina nigripes. (Plate X, figs.l, la.) 



Brachi/mi/ia {Eriophora) nigripes Williston, Can. Ent., xiv, 78, 1882. 

 EurhinamaUota nigripes Williston, Proc. Am. Phil. Soc, xx, X\0, 1882. 



Habitat. — California ! 



9 . Length, 13""". Antenna? nearly black, first joint scarcely longer 

 than the second, third joint broader than long, the front border only 

 gently convex. Face in the middle gently convex, thickly covered on 

 the sides with yellowish-white i)ollen, the median stripe and broad 

 cheeks shining, tlie latter thinly yellowish pilose. Front moderately 

 broad, shining black, with black pile, on the vertex with yellow pile. 

 Proboscis not very long. Posterior orbits rather broad, yellowish dusted 

 an<l with long, yellowish white pile. Thorax with abundant, rather 

 long yellowisii pile in front, black across the middle between the wings, 

 behind yellow, abundant and bushy on the i)ost-alar callosities, quite 

 long and thick on the scutellum. Pleura} with dense yellow pile. Ab- 



