SYNOPSIS OF NORTH AMERICAN SYRPHID^. 249 



Spilomyia (Mixtemyia) ephippium. 



Mixtemyia ephippium Osten Sacken, Bull. Buff. Soc. N. S., iii, 70; Cat. Dipt., p. 

 254. 



Habitat— Mexico (O. S.)! 



^ • Length, 12™™. Face yellow, with a brown stripe in the middle, 

 which does not quite reach the antennae; the latter brown; second 

 joint almost black ; triangle of the vertex dark brown. Thorax dark 

 brown ; a brownish yellow angular line runs from the scutellum, above 

 the root of the wings, turning inside to follow the thoracic suture and 

 stopping before meeting the corresponding line on the other side ; a 

 less distinct angular line, on the anterior part of the thorax, begins on 

 each side, at the yellow humeral tubercle, follows the anterior margin of 

 the thorax and before reaching its middle, turns backwards ; in the mid- 

 dle of the anterior margin, between the two angular lines, two delicate, 

 short parallel yellow lines are perceptible. Scutellum brown in the mid- 

 dle, with yellow borders. Pleume brown ; a yellow spot above the root 

 of the front coxae. Abdomen light brown; second segment with an 

 arcuated yellow stripe, resting with its middle on the anterior, with 

 its ends on the posterior margin, which is also yellow; the inside of 

 the semicircle thus formed, is dark brown, velvety; the third and fourth 

 segments are clothed with a fine sericeous down ; the third has a dis- 

 tinct tubercle in the middle and is margined with yellow posteriorly ; 

 the fourth is traversed by a yellow cross-band in the shape of an in- 

 verted V, the ends of which do not reach the lateral margins; hypo- 

 pygium brown. Anterior half of the wings brown, the posterior hya- 

 line ; the anal cell, the second posterior, the discal, and a part of the 

 first posterior cell, as well as the whole posterior margin, including the 

 alula, being hyaline (in M. quadrifasciata the second basal cell and the 

 whole portion of the first basal, situated behind the spurious vein, are 

 also hyaline). Legs; femora dark brown, the hind ones with a strong 

 tooth on the under side ; tibiae yellowish brown, pale yellow at the base ; 

 front tarsi brown; middle and hind ones reddish brown, last two or 

 three joints brown. — Osten Sacken. 



This species, the type specimens of which 1 have examined in the 

 museum at Cambridge, is much like quadrifasciata in general appearance, 

 but is easily distinguishable. 



ADDITIONAL NORTH AMERICAN SPECIES. 

 Spiilomyia padlipes Bigot, Ann. Soc. Ent. de Fr., 1883, 352. — Mexico. 



TEMNOSTOMA.* 



Temnostoma St. Fargeau and Serville, Eucycl. Meth. x, 518, 1825. 



In structure nearly like Spilomyia, but differs in the hind femora 

 being without a tooth below on the outer part. The markings, more- 

 * Ts^ivEiv, to cut; dro/ua, mouth. 



