r 



from the Rio XautJa^ State of Vera Cruz. 21 



calling tlie third the second, &c. The first segment is wide, 

 short, lunate in shape, and yellow, with hind border broadly 

 dark brown, the brown not estendins: the full width of seo-ment. 

 Neither arm of the liorseshoe-lilie yellow lateral marking of 

 third segment reaches hind margin, but the arms are equal. 

 On fourth and fifth segments both arms reach hind maro-in. 

 Sixth segment shows this marking as a small V on each 

 side. Third, fourth, and fifth segments show the median 

 linear vitta throughout, but this is only very faintly apparent 

 on the elongate and narrowed second segment. The yellow 

 marking called by Schiner " horseshoe-shaped " is very 

 narrow to be so characterized, and on third segment is rather 

 inverted V-shaped. On third and fourth segments it is open 

 behind, but on fifth its arms join on hind margin of segment 

 on one side in this specimen, while on the other side they 

 are open. The facial tubercle is of good size and prominent. 

 Black ocellar spot not shining, opaque. Hind femora pale 

 reddish on more than basal half, with only faint ring of 

 brown before tips. Wings tinged with fuscous yellowish, 

 appearing deep yellow when held up to the light. In 

 Sciiiner's specimens the wings were doubtless darker. I 

 give these detailed comments on Schiner's description, so as 

 to assist in the determination of the species in the future. 



7. Ocyptamus fuscipennis, Say. 



Three female specimens, March 2 and 23, San Kafael ; 

 and April 7, Paso de Telaya. 



Length about 8 millim. 



The white of face does not extend on sides of front. Face 

 hardly yellowish in one specimen. All the tarsi reddish 

 yellow in tvvo specimens, and only hind tarsi faintly tinged 

 with brownish in the other. Black of wings not at all 

 diluted in anal, last posterior, and discal cells in one speci- 

 men, and but very slightly in tliB other two. 



8. Volucella ohesa, Fabr. 



One male, July 18, San Rafael. On flowers of the 

 Cordia sp. 



9. Eristalis ornatus, sp. n. 



Two males, July 10, San Eafael. On flowers of the 

 Cordia sp. 



(J. Length 10^ to 11 millim. 



Near to E. ochraceus, from Williston's description of which 

 (Trans. Am. Ent. Soc. xv. p. 279) it difiers as follows : — There 



