390 PROCEEDINGS OF THE NATIONAL JVIUSEUM vol. io8 



Phytobia {Calcomyza) cassiae (Frost) 



Agromyza sp., Frost, Sci. Month., vol. 30, p. 445, 1930 (figure of leaf mines). 

 Agromyza cassiae Frost, Ann. Ent. Soc. Amer., vol. 29, p. 306, 1936. 



The holotype female is in the U. S. National Museum (No. 62965). 

 Phytobia (Caly corny za) cassiae is very similar to P. (C.) malvae and, 

 because the type series is in poor condition, separation of the two 

 species is difficult. The very long arista, subequal in length to the 

 eye height, is probably the best character to use at this time. The 

 larvae make serpentine mines in the leaves of Cassia bacillaris L. 

 The type series is from the Panama Canal Zone and I have identified 

 two specimens from Puerto Rico as belonging to Phytobia (Calycomyza) 

 cassiae. 



Phytobia {Calycomyza) cynoglossi Frick 



Phytobia (Calycomyza) cynoglossi Frick, Ann. Ent. Soc. Amer., vol. 49, p. 295, 

 1956. 



The larvae mine the leaves of Cynoglossum spp. This species is 

 general throughout Canada but is not known west of Kansas in the 



United States. 



Phytobia {Calycomyza) flavinotum Frick 



Agromyza allecta (Melander), Frost (part), Mem. Cornell Univ. Agr. Exp. Sta., 



vol. 78, p. 38, 1924. 

 Phytobia {Calycomyza) flavinotum Frick, Ann. Ent. Soc. Amer., vol. 49, p. 297, 



1956 (figure of antenna). 



This is a distinctive species in that the inner postalar seta is on 

 yellow. The larvae have elongate anal lobes and make large blotch 

 mines in the leaves of Arctium lappa L., Eupatorium purpureum L., 

 and Viburnum pubescens Pursh. 



Phytobia {Calycomyza) gigantea Frick 



Agromyza platyptera (Thomson), Malloch (part), Ann. Ent. Soc. Amer., vol. 6, 



p. 293, 1913. 

 Phytobia (Calycomyza) gigantea Frick, Ann. Ent. Soc. Amer., vol. 49, p. 296, 1956. 



This is the largest species (1.75-2.5 mm. in wing length) known in 

 the subgenus. The larval host plants are unknown. This species is 

 recorded in the United States from Illinois, Virginia, Maryland, and 

 in Canada from Ontario and from Quebec. 



Phytobia {Calycomyza) humeralis (von Roser) 



Agromyza humeralis von Roser, Korresp.-Blatt. Wuertt. Landw. Ver., vol. 8, p. 63, 



1840. 

 Phytobia {Calycomza) humeralis (von Roser), Frick, Ann. Ent. Soc. Amer., vol. 49, 



p. 290, 1956 (figures of antenna, larval characters, and leaf mines). 



The larvae are unique in having eight to ten bulbs in the posterior 

 spiracles. Many larval host plants in the Compositae are known 



