480 Professor Williston on the 



collar and extends to back of the middle: the lateral portions behind, 

 near the humeri, and reach nearly to the scutellum, with an angular 

 incision at the , hind end and at the suture. The scutellum has a 

 small blackish spot on each margin and its dorsum is sometimes 

 brownish. The ovipositor is about as long as broad, and about as 

 long as the fifth segment. Metanotum black. Halteres light 

 yellow. Abdomen yellow, the dorsum brownish or reddish-yellow. 

 Wings hyaline ; penultimate section of the fourth vein a little 

 longer than the posterior cross- vein and not more than a fourth or 

 a fifth of the length of the last section of the fifth vein. 

 Length l|-2 mm. 



Numerous specimens. St. Vincent. There is some 

 variation among the specimens, which possibly may 

 indicate specific differences. ?. Wings as described; 

 black of the mesonotum extending furthest back in the 

 middle, nearly to the scutellum; abdomen brownish- 

 yelloWj the first three segments with a brown cross-band, 

 the last two with a small brown spot in the middle. 

 S. Like the typical specimens, but the penultimate section 

 of the fourth vein not one-third the length of the last 

 section of the fifth vein. One of the typical specimens 

 is labelled : " Mt. St. Andreas at Cavalries Forest^ 

 1200 feet, Oct. 16.^' 



4. Agromyza anthrax, n. sp. 



$ . Black, but little shining. Front very broad, nearly square, 

 its width rather exceeding its length ; opaque black, on its lower 

 margin yellowish. Antennae black, third joint rounded, large, 

 pubescent; arista very short pubescent. Face receding, excavated, 

 not at all visible from the sides ; cheeks linear, with black bristles 

 along the oral margin and a rather stout vibrissal bristle in front. 

 Palpi projecting beyond the oral margin, yellow. Mesonotum and 

 scutellum a little shining. Abdomen opaque, oval. Halteres 

 yellow. Knees and tarsi yellow, the distal joints of the latter 

 brownish. Wings lightly tinged ; the third vein terminates in the 

 npex of the wing ; penultimate section of the fourth vein about 

 one-third as long as the ultimate section of the fifth. 

 Length 1 \ mm. 



One specimen. St. Vincent. 



