332 Annals Entomological Society of America [Vol. VI,. 



pollen, or with the central portion in front of scutelltim yellow, more- 

 rarely with two narrow black stripes on sides, and the central yellow 

 portion carried forward at its anterior margin, slightly beyond middle, 

 as narrow lines which more or less distinctly intersect the broad discal 

 black mark, giving the disk the appearance of having five stripes, or a 

 pattern somewhat similar to that of Agromyza we/aw/'yga; lateral margins 

 of mesonotum broadly yellow; humeri with a black spot; four pairs 

 of dorso-central bristles on mesonotum; no setulee on disk; pleurae 

 yellow with black varigations; squamae yellow, the fringe brownish 

 or grayish; scutellum all black or with the disk yellow, two scutellar 

 bristles present. Abdomen from almost entirely yellow to almost 

 entirely black, posterior margins of segments narrowly yellow. Legs 

 slender, yellow, sometimes with fore tibife and tarsi blackened, all 

 tarsi brownish. Wings as figure. 

 Length 2-2.5 mm. 



The following is a list of the States from which I have seen 

 specimens: Connecticut, Massachusetts, low^a, Florida, Geor- 

 gia, District of Columbia, Kentucky, Indiana, Nevada, New 

 Mexico, Texas, Utah, Washington, Tennessee, Nebraska, 

 Michigan, Illinois and California. 



I have also seen specimens from Mexico and Porto Rico. 

 The larva mines the stems of grains and grasses. 



ADDENDA. 



Agromyza quadrisetosa, new species. 



Female: Back subshining. Head yellow, ocellar spot, upper 

 third of orbits, back of head, 3rd antennal joint, palpi and upper mouth 

 margin black. Mesonotum with lateral margins broadly pale, whitish 

 yellow, humeri with a black spot; pleurae with upper margin concolorous 

 with margin of mesonotiim; scutellum yellow, margined on sides with 

 black, squamas yellow. Abdomen black, glossy, the segments with 

 narrow, yellow, posterior margins. Legs entirely shining black. Wings 

 clear, basal portion of veins pale yellow, outer portions brownish. 

 Halteres yellow. 



Frons about one and one-third times as long as broad at vertex;, 

 orbits glossy, six orbital bristles present, incurved, situated on middle 

 of orbit and of good length; orbits otherwise bare; antennae of moderate 

 size, third joint rounded, second joint with dorsal bristle distinct; 

 arista tapering, bare, brown in color, equal in length to from its base 

 to second uppermost orbital bristle; cheeks at anterior margin about 

 equal in height to breadth of third antennal joint, at posterior margin 

 equal to slightly more than half of the height of the eye. Mesonotum 

 with 4 pairs of dorso-centrals, between which are 2-3 irregular rows of 

 setulae which do not extend to posterior dorso-centrals; scutellar bristles 

 (4) subequal. Abdomen with apices of all segments anned with 

 rather strong bristle-like hairs. Legs with mid tibial posterior bristles 

 absent or very weak. Wings with costa to fourth vein; veins 3-4 



