1913] Agromyza and Cerodontha. , 279 



minor diifferences used by Meigen for the separation of his 

 species may be found in the same species. Agromyza blanda 

 Meigen may be a different species as also may A. annulipes 

 Meigen, species 61 of the series quoted in synonomy, but they 

 may only be color varieties. The number of examples in 

 existence representing Meigen's types of this group are as 

 follows: pusilla, 1, (Paris); annulipes, 1, (Paris); pumila, 

 3, (Vienna); exilis, 1, (Paris); pusio, 1, (Paris); 2, (Vienna); 

 orbona, 1, (Vienna); puella, 1 defective specimen, (Vienna); 

 amoena, 1, (Paris); blanda, 1, (Paris). 



Male and Female: Black, shining. Marked in most variable 

 degree with yellow. Frons except ocellar region, and sometimes a 

 narrow side stripe posteriorly, ^^ellow; remainder of head parts except 

 behind vertex, yellow. Mesonotum with a more or less broad yellow 

 margin, which never extends distinctly round the anterior nor posterior 

 margin; four pairs of dorso-central bristles present as well as numerous 

 short hairs on disk; humeri with a black spot. Pleurse with sometimes 

 spots much as in xanthophora and at other times almost entirely black, 

 with the sutures and upper margin yellow; scutellum entirely yellow, 

 or yellow with black basal side spots, which in some cases extend 

 almost round the entire margin and on to the disk; postnotinn black. 

 Abdomen yellowish with dark brownish bases to segments, black with 

 pale apices to segments, or entirel}^ shining black with the apical seg- 

 ment whitish, or yellowish, at apex. Legs almost entirely yellow, the 

 tarsi only brownish, to legs almost entirely black with knee joints yellow, 

 the femora generally less intensely black than other parts of legs Mid 

 tibia without distinct posterior bristles. Wings clear; second division 

 of costa about two and one-half times as long as first section, third and 

 fourth veins divergent at extremities; outer cross vein as long as or 

 slightly shorter than the section of fourth anterior to it, basal two 

 sections of fourth subequal or the second slightly the shorter; last sec- 

 tion of fifth vein about three times as long as preceding section. 



Halteres yellow. 



Length, 1-1.75 mm. 



This is a most variable species in color and is very widely- 

 distributed. The following is a list of states from which it 

 is represented in the material I have examined. (A full list 

 of American localities, with list of food-plants will appear 

 in the economic bulletin, now ready for tha press, dealing 

 with this species). 



Massachusetts, Connecticut, District of Columbia, Arizona, 

 Wyoming, Texas, Colorado, California, Utah, Kansas, New 

 Mexico,, Indiana, Idaho, Florida and Virginia. It is probable 

 that this species occurs all over the United States. 



