CONOPS.— PHYSOCEPHALA. 



81 



Hab. Mexico, Amula and Omilteme in Guerrero (H. H. Smith). 



Two specimens. In this species the outer section of the fourth vein is nearly 

 parallel with the great cross-vein. A male from Temax, Northern Yucatan (Gaumer), 

 differs in having the pleural stripe distinctly limited above, the yellovv abdominal 

 bands absent, the legs more reddish-brown, the tarsi in large part yellow, and the 

 third joint of the antennae proportionately a little shorter. It is probable that these 

 difTerences are specific. 



4. Conops ? 



Hab. Mexico, Temax in Northern Yucatan (Gaumer). 



A single female specimen, much resembling the male from Yucatan mentioned 

 above under C. sequax, but with the face entirely black, instead of light yellow. It 

 is not improbable that it may prove to be conspecific with that example ; if so, the 

 species must be distinct from C. seqiiax. The face of this female has a silvery sheen, 

 variable in different aspects. The specimen is in a bad state of preservation. 



5. Conops ? 



Hab. Mexico, Chilpancingo in Guerrero (H. H Smith), Jalisco (Schumann). 



Two indifferently preserved, male and female, specimens represent a species distinct 

 from the other Conops here mentioned. It diflers from C. sylvosus, the only other 

 species in our collection with yellow cheeks, in lacking the hyaline cross-band before 

 the tip of the wing, the brown of the whole submarginal cell being nearly uniform in 

 colour. Length 10 millim. 



6. Conops sylvosus. 



Conops sylvosus, Willist. Trans. Conn. Acad. iv. p. 329, and vi. p. 390 \ 



Hab. United States, Massachusetts \ Connecticut \ Kansas l . — Mexico, Xucuman- 

 atlan in Guerrero 7000 feet (H. H. Smith). 



Six examples, agreeing well with the types and the description. The face is often 

 blackish, and the proboscis is longer than the last two joints of the antennse taken 

 together. The specimens vary in length from 6-9 millim. 



PHYSOCEPHALA. 



Physocephala, Schiner, Wien. ent. Monatschr. v. p. 137 (1861) ; Fauna Austr., Diptera, i. p. 375; 

 Williston, Trans. Conn. Acad. vi. p. 388. 

 biol. CENTE.-AMEE., Dipt., Vol. III., May 1892. m 



