24 PROCEEDINGS OF THE NATIONAL. MUSEUM vol.70 



MESOGKAMMA PHILIPPI, new name 



Syrphus interruptus Philippi, Verb. Zool.-bot. Ges. Wieu., vol. 15, 1865. p. 

 747. (Name preoccupied by Syrphus interruptus Gmelin, 1792). 

 Male. — A species easily recognized, within the genus, by its pecu- 

 liar abdominal yellow markings. The usual transverse yellow bands 

 are reduced to a pair of submedian yellow spots on each segment 

 which may be joined by slender connections to the yellow lateral 

 abdominal margins. 

 One specimen. 

 Perales, Chile, September 23 (A. Faz). 



MESOGKAMMA CALCEOLATUS (Macquart) 



Syrphus calceolatus Macquart, Dipt. Exot., vol. 2, 1842, p. 9. 

 The yellow crossbands extend completely across tergites two, three. 

 four, and five and join the yellow lateral margins of the abdomen. 

 One male, five females. 

 Santiago, Chile, 1924 (A. Faz). 



Genus ALLOGRAPTA Osten Sacken 

 Allograpta Osten Sacken, Bull. Buffalo Soc. Nat. Hist., vol. 3, 1876, p. 49. 



Two species are at hand which belong to the difficult Mesogravivia- 

 Allograpta-Sphaero'phoria group, in which the generic limits are 

 very poorly defined. The species at hand are apparently more closely 

 related to the genotype of Allograpta, obliqua Say, than to the geno- 

 types of the other two genera and are therefore here considered under 

 Allograpta. In fact F. Lynch- Arribalzaga has already placed one of 

 them in this genus. 



ALLOGRAPTA HORTENSIS (Philippi) 



Syrphus horiensis Philippi, Verb. Zool.-bot. Ges. Wien, vol. 15, 1805, p. 746. 



A female specimen at hand agrees very satisfactorily with Philippics 

 description. A shining bronzy black stripe of uniform width extends 

 from the anterior oral margin upwards through the base of the an- 

 tenna and clear to the vertex, where it widens out and joins the eye 

 margins; jowl yellow with a black spot extending from the middle 

 of the oral margin to the eye; mesonotum bronzy black, a yellow 

 stripe on the side extending from the anterior corner to the root of 

 the wing; post alar callus and scutellum yellow; meso- and sterno- 

 pleurae with a yellow spot; metapleura very obscurely yellow; legs 

 mostly yellow, the tarsi, apical half of hind femur, and hind tibia 

 brownish, a pale ring at the middle of the tibia; apical corners of 

 abdomen yellow; a broadly interrupted yellow crossband midway of 

 the second tergite, which is parallel to the fore and hind margins of 

 the tergite; third, fourth, and fifth tergites each with a pair of 



