410 PROCEEDINGS OF THE NATIONAL MUSEUM vol. los 



Liriomyza sorosis (Williston), new combination 



Agromyza sorosis Williston, Trans. Ent. Soc. London (1896), p. 429, 1896. — 

 Melander (part), Journ. New York Ent. Soc, vol. 21, p. 258, 1913 (2 cf cf, 

 Texas and Illinois, excluding 1 cf from Bolivia). 



Agromyza melampyga (Loew), Coquillett (part), U. S. Dep. Agr., Div. Ent. Bull. 

 10, p. 78, 1898.— Malloch (part), Ann. Ent. Soc. Amer., vol. 6, p. 282, 1913 

 (specimens from Plantago spp.) — Frost, Mem. Cornell Univ. Agr. Exp. Sta., 

 vol. 78, p. 47, 1924.— Frick, Univ. California Publ. Ent., vol. 8, p. 404, 1952. 



Lectotype male (British Museum, Natural History) from windward 

 side of St. Vincent, Windward Islands, West Indies, 1907-66 (H. H. 

 Smith). This specimen is labeled "Cotype" while a headless male in 

 the American Museum of Natural History (No. 20332) and a female 

 in the Snow Entomological Museum are each labeled "Type." None 

 of the British Museum syntypes, according to H. Oldroyd, bears the 

 label "Mt. St. Andreas at Cavalries Forest, 1,200 feet. Oct. 16." 

 Such a specimen Williston considered as one of the typical specimens 

 in a series that showed such variation that he mentioned the variation. 

 Liriomyza sorosis includes the specimens of Agromyza melampyga (of 

 authors) that had been reared from Plantago major L., P. media L., 

 and possibly other species of Plantago. 



Liriomyza sorosis is close to L. marginalis and L. barrocoloradensis 

 but has the mesonotum a uniform dark brown (fig. 124). There are 

 usually foiu- dorsocentrals, but frequently the second is greatly 

 reduced or absent. The head is very similar to that of L. barrocolora- 

 densis in having the eye widest above the midline (fig. 125). The 

 type series is from St. Vincent, British West Indies, but specimens 

 have been found in the United States from South Dakota, Illinois, 

 Indiana, Michigan, Pennsylvania, Maryland, Virginia, Florida, and 

 Texas. 



Liriomyza trifolii (Burgess) 



Oscinis trifolii Burgess, Ann. Rep. U. S. Dep. Agr. (1879), p. 200, 1880. 

 Liriomyza congesta (Becker), Mitt. Zool. Mus., vol. 2, p. 190, 1903. 

 Agromyza pusilla (Meigen), Frost (part), Mem. Cornell Univ. Agr. Exp. Sta., 

 vol. 78, p. 51, 1924 (figure of leaf mine on Trifolium repens). 



This species belongs to the group with only two rows of acrostichal 

 setae. It is slightly darker than Liriomyza allia or L. phaseolunata , 

 has the black of the occiput reaching the eye margin, and its mesono- 

 tum has the inner postalar seta on black. The larvae form serpentine 

 mines in the leaves of many species of legumes in Europe and I have 

 reared it from Trifolium hybridum L., T. repens L., Medicago sativa L., 

 Melilotus alba Desr., M. indica All., and Vicia villosa Roth in Wash- 

 ington. I have seen specimens from Washington, Oregon, California, 

 Indiana, and Florida, but the species is probably present throughout 

 the United States. 



