June, 1907.] Jones : List of Nebraska Syrphid^. 87 



smaller size and different coloration, and in the elytra being shorter 

 than the abdomen (though not very much so) nearly as in typical 

 Methia. The fifth ventral in the female is broad, pale in color, tri- 

 angularly emarginate from side to side, the emargination fringed with 

 capitate hairs in addition to the usual pubescence. In the male the 

 fifth ventral is also broadly though less triangularly emarginate, the 

 following segments visible in and behind the emargination, the pubes- 

 cence of the usual form. 



Class I, HEXAPODA. 



Order IV, DIPTERA. 



A PRELIMINARY LIST OF NEBRASKA SYRPHID^ 

 WITH DESCRIPTIONS OF NEW SPECIES. 



By Paul R. Jones, 

 Lincoln, Nebraska. 



In making this list of the Nebraska Syrphidse the writer has 

 examined and included all published records, and determined the col- 

 lection of the University of Nebraska. I desire to thank Mr. Myron 

 H. Swenk for his criticism and valuable suggestions, and Dr. S. W. 

 Williston for kindly verifying some of my determinations. 



I. MICRODON Meigen. 



1. Microdon coarctatus Loew. 



Three males from Sioux County, Nebraska. Formerly recorded 

 from District of Columbia, Mexico and Florida. 



2. Microdon lanceolatus Adams. 



9. Length ii mm. Head black, subfulgent, covered with yellowish white 

 pile, eyes bare. Ar.tennEe black, first joint a trifle longer than the second and third 

 together, second joint nearly two thirds as long as third joint, third when viewed from 

 side lanceolate as in the male, and subconical when viewed from above ; arista basal, 

 bare, a little longer than the third joint, yellowish, darker at the base.. Face black, 

 subfulgent, coarsely and sparsely punctured, pile lighter. Thorax black, subfulgent, 

 mesonotum and scutellum thickly yellowish white pilose, pleura more sparsely so, 

 scutellum without spines. Thorax and scutellum more finely punctate than the face. 

 Abdomen black, finely punctate, black pilose except second segment and lateral 



