Vol. XXVl] ENTOMOLOGICAL NEWS. 45! 



TABLE OF SPECIES. 

 Males. 



1. Second antennal joint and legs yellow flavipes 



Antennae black 2 



2. Basal joint of hind tarsi notched near base beneath 3 



Not so atra 



3. Hind tibiae stout with an apical spur extending to or beyond the 



notch 4 



Hind tibiae without any spur 5 



4. Fore tibiae very long and slender with black swelling near middle ; 



hind tibial spur short; basal joint of hind tarsi shorter than 



following armipes 



Fore tibiae normal; hind tibial spur very long; basal joint of hind 



tarsi longer than following armata 



5. Tibiae and femora black tibialis 



Tibiae and only apical half of femora yellow rileyi 



Females. 



1. Second antennal joint and legs yellow flavipes 



Antennae black 2 



2. Shining species with yellow scutellum scutellata 



Opake pruinose species 3 



3. Legs entirely yellow rileyi 



Femora and tibiae marked with black pictipes 



Mythicomyia scutellata, Fig. 4. 



1902. Coquillett, Proc. U. S. Nat. Mus. xxv, 102. 



9 . Black, polished, sparsely pilose. Frons at antennae, face, cheeks, 

 oral margin, humeri, notopleural stripe and post alar spot, scutellum, 

 pleural stripe sometimes faint or wanting, halteres, apices of abdominal 

 segments broad laterally, venter, knees, apices of tibiae, tarsi, or some- 

 times entire legs except apices of tarsi, yellow. 



Third antennal joint ovate, broader than second, somewhat longer 

 than broad (fig. 4) ; style cylindrical hardly half as long as third. Pro- 

 boscis short not longer than head. Anal cell open. Length 1.5 mm. 



$ . Unknown. 



Type. $ , Williams, Arizona, June 6, 1902 (H. S. Barber), 

 [U. S. N. M. No. 6195]. 



Paratypes. 3 $ ; topotypical. 



Before me are four specimens from Alamogordo, New Mex- 

 ico, and one from Highrolls, New Mexico, collected in April 

 and May, which I refer here without doubt. The color of the 

 legs varies considerably and it is questionable whether such 

 can be used in the separation of the species. In three of these 



