ART. 9 TWO-WINGED FLIES OF TRIBE MILTOGRAMMINI — ALLEN 79 



OTHER SPECIES OF HILARELLA MENTIONED BY COQUILLETT ^^ AND ALDRICH " 



decens Townsend, assigned to gemis Eumacronychia. 

 fulvicornis Coquillett, assigned to genus Phrosinella. 

 polita Townsend, assigned to genus Gymnoprosopa. 

 siphonina Zetterstedt equals Hilarella hilarelia. 

 aristalis Coquillett, assigned to genus Oestrohilarella. 

 rufiventris Coquillett, assigned to genus Senoiainia. 



HILARELLA HILARELLA (Zetterstedt) 



Miltogravima hilarella Zetterstedt, Dipt. Scand., vol. 3, p. 1212, 1844. 

 Miltogramma siphonina Zetterstedt, Dipt. Scand., vol. 3, p. 1213, 1844; 



vol. 8, p. 3255, 1849; vol. 12, p. 4704, 1850; vol. 13, p. 6154, 1859. 

 Hilarella zetterstedti Rondani, Dipt. ital. Prodr., vol. 1, p. 70, 1856; vol. 3, 



p. 213, 1859. Equals hilarella, according to Bezzi and Stein, Kat. 



Pal. Dipt.^ — ScHiNER, Faun. Austr., vol. 1, p. 504, 1862. — Brauer 



and Bergenstamm, Denkschr. Akad. Wien, vol. 51, pi. 6, fig. 133, 1889. 

 Misellia siphonina Robineau-Desvoidy, Dipt. Envr. Paris, vol. 2, p. 148, 



1863. 

 Misellia brunnicosa Robineau-Desvoidy, Dipt. Envr. Paris, vol. 2, p. 148, 



1863. 

 Heteropterina hilarella Pandelle, Rev. entom., vol. 14, p. 312, 1895. 

 Hilarella siphonina Coquillett, U. S. Bur. Ent., Tech. Ser., No. 7, p. 129, 



1897. — Smith, Insects of New Jersey, p. 782, 1909. 



Bezzi and Stein ^^ place hrunnicosa and siphonina in the synonymy 

 of dira Robineau-Desvoidy. But dira equals Miltogramma conica 

 Fallen, according to Robineau-Desvoidy's own statement, and conica 

 belongs to Sphecapata equals Senoiainia , an entirely distinct genus. 

 I find from a study of Zetterstedt's original descriptions that siphonina 

 agrees closely with hilarella, differing from it principally in having the 

 segments of the abdomen marked with minute brown spots, whereas 

 hilarella has transverse rows of three larger spots. An examina- 

 tion of the available American and European material indicates that 

 most of the specimens have the transverse rows of three large spots, 

 but in some specimens this character is variable. On one female in 

 my collection, from Lafayette, Indiana, the spots on the abdomen are 

 small, and the usual median one has been broken into two smaller 

 ones, about the bases of the two median marginal bristles. In 

 another specimen from Europe, labeled Hilarella hilarella by Pro- 

 fessor Bezzi, the side spots are large, but as with the Indiana specimen, 

 there are two small apical spots about the bases of the two median 

 marginal bristles. These characters, unsupported by others, can 

 scarcely be considered as of specific importance, hence it is my 

 opinion that siphonina equals hilarella. 



The principal characters of the species are as follows : The anterior 

 part of the frontal vitta, the first two joints of the antennae and 



39 U. S. Bur. Ent. Tech. Ser., no. 7, p. 128, 1897. 

 " Cat. of N. A. Dipt., p. 476, 1905. 

 3' Kat. Pal. Dipt., vol. 3, pp. ol3-514. 



