322 Annals Entomological Society of America [Vol. VI, 



the upper surface of the eyes close to the orbits. A single 

 specimen from Claremont, California (Baker), may belong 

 to a distinct species. 



48. Agromyza caerulea, new species. 

 Plate XXIX, Fig. 13. 



Female: Frons black; center stripe opaque brown-black, orbits 

 and ocellar triangle glossy black; width of frons equal to slightly over 

 one-third that of head; each orbit slightly less than one-fourth the 

 breadth of center stripe; four strong orbital bristles present, the orbital 

 pubescence not very conspicuous; frontal triangle fairly well defined, 

 reaching over three-fourths of the way to lunule; lumile shining, brown- 

 ish, with indications of whitish pollinosity; antennae small, black; 

 dorsal bristle on second joint long; third joint not longer than broad, 

 roimded at apex, pilosity pale, very short; arista thickened and tapering 

 on basal fourth, pubescence distinct, slightly longer than basal diameter 

 of arista, length of arista equal to from its base to upper orbital bristle; 

 face short, black, concave in profile; cheek short, shining black, mar- 

 ginal bristles very numerous, strong, and irregularly arranged, not in 

 a single row, carried upward beyond the level of the weakly differ- 

 entiated vibrissa; proboscis yellow at apex; palpi black, niunerously 

 bristled; occiput not produced. Mesonotum glossy blue-black, more 

 inclining to brown-black on lateral margins; two distinct pairs of dorso- 

 centrals present; disk covered with numerous short setulse; no distinct 

 bristles between the posterior dorso-centrals; pleurae glossy blue- 

 black, sutures and below wing base brown; squamse white, fringe con- 

 colorous; scutellum concolorous with disk of mesonotum, the marginal 

 bristles subequal. Abdomen ovate, bronzy blue-black; first two seg- 

 ments short, the others subequal, all segments with short discal setulae, 

 those on posterior margins of segments strong; base of ovipositor not 

 longer than preceding segment. Legs strong, especially the femora, 

 which are thickened; black, shining, tibiae at base brownish; fore tibia 

 with a strong bristle on posterior surface at below middle; the pair of 

 bristles on posterior surface of mid tibia strong. Wings clear, veins 

 brownish yellow; second costal division about twice as long as first; 

 subcostal vein indistinct; outer cross vein at slightly below wing middle, 

 and at a little more than its own length from margin to wing on fifth 

 vein, and from inner cross vein; veins 2-3 divergent, 3-4 slightly con- 

 vergent at apices; inner cross vein at below junction of first vein with 

 costa, and at middle of discal cell. Halteres black, pedical yellowdsh brown. 



Length 3-4 mm. 



Type: Cat. No. 15584, U. S. N. M. 



Locality: The specimen bears the M. S. label "S. J. 

 Allende, Mexico," and the numbers 11-29, which probably 

 means that it was taken on November 29. I cannot find on 

 the available maps of Mexico any locality in accordance with 

 that on the label. No collector's name is given. One specimen. 



Food-plant tmknown. 



