106 Ajinals Entomological Society of America [Vol. XII, 



nigrimystaceus Macquart, Dipt. Exot., vSupl. 2, 1847. 



nigritarsis new species. 



portoricensis new species. 



rufitibia Macquart, Dipt. Exot., Supl. 3, 42, tab. II, fig. 11, 1848. 



for lis Walker, List. VII, 623, 1855. 

 slossonae new species. 

 stylatus Fabricius, Syst. Ent. 795, CAsilus), 1775. 



haitensis Macquart, Dipt. Exot., Supl. 3, 28, tab. II, fig. 10, 1848. 



caudex Walker, List II, 404, (Asilus), 1849. 



invarius Walker, Ins. Saund., Dipt. I, 131, 1851. 

 *tabescens Banks, new species. 



The carinatus group. 



carinatus Bellardi. Saggio, II, 36, tab. II, fig. 9, 1861. 



comatus Bellardi, Saggio, II, 34, 1861. Not identified in my material. 



concinnatus Williston, Biol. Cent. Am., Dipt. I, 323, 1901. 



costalis Williston, Trans. Am. Ent. Soc, XII, 64, 1885. 



cressoni new species. 



jubatus Williston, Trans. Am. Ent. Soc, XII, 66, 1885. 



prolificus Osten Sacken, Biol. Cent. Am., Dipt. I, 202, 1887. 

 latruncuius Williston, Trans. Am. Ent. Soc, XII, 67, 1885. 

 parvulus Bellardi, Saggio, II, 35. tab. II, fig. 8, 1861. 

 subcupreus Schaeffer, Jr. N. Y. Ent. Soc, XXIV, 66, 1916. 

 unicolor Bellardi, Saggio, II, 37, 1861. 



The tuberculatus group. 



productus new species. 



spiniventris new species. 



tuberculatus Coquillett, Jr. N. Y. Ent. Soc, XII, 34, 1904. 



The rufibarbis group. 



bicaudatus new species. 



rufibarbis Macquart, Dipt. Exot., I, 2, 116, ^838. 



aestiKuis Wiedemann, Dipt. Exot., 200, (Asilus), 1821, (not Linncaus); Auss. 



Zw.. I, 467, (Asilus), 1828. 

 complefus Macquart, Dipt. Exot., I, 2, 117, tab. IX, fig. 9, 1838. 

 dascvllus Walker, List II, 401, (Asilus), 1849. 

 virginianus van der Wulp, Tijdschr. y. Entom. XXV, 109. tab. X, figs. 5 and 6, 



{Proctacanthus), 1882. 

 rams Coquillett, Canadian Entomologist, XXV, 176, (Efferia), 1893. 



The stramineus group. 



argentifrons Hine, Ohio Naturalist, XI, 308, 1911. 



argyrogaster Macquart, Dipt. Exot., supl. 1, 84, 1846. 



argyrosoma Hine, Ohio Naturalist, XI, 310, 1911. 



auripilus Hine. Ohio Jr. Science, XVII, 22, 1916. 



aurivestitus new species. 



californicus Schaeflfer, Jr. N. Y. Ent. Soc. XXIV, 67, 1916. 



canus Hine, Ohio. Jr. Sci. XVII, 22, 1916. 



coquillettii new species. 



dubius Williston, Trans. Am. Ent. Soc, XII. 64, 1885. 



eximeus Bellardi, Saggio, II, 38, 1861. 



inflatus Hine, Ohio Naturalist, XI, 310, 1911. 



* Among a number of species receiyed from the Museum of Comparative 

 Zoology were two species which Dr. N. Banks had named and the descriptions 

 in manuscript were turned over to me. The two species are Erax tabesuns and 

 Erax texanus, and Dr. Banks is credited with these, although they are published 

 for the first time in this paper. 



