148 THE CANADIAN ENTOMOLOGIST 



A NEW MARITIME ANTHOMYID (DIPTERA). 



BY CHARLES W. JOHNSON, BOSTON, MASS. 



Phyllogaster robustus, sp. n. 



cf. Face silvery white, front brownish and occiput grayish 

 polHnose, antennae, aristae, palpi and proboscis black, arista pubes- 

 cent, thickened near the base. Thorax grayish with three con- 

 spicuous brownish lines when viewed from behind, all the bristles 

 prominent, dorso-centrals three, scutellum with two large apical 

 and one lateral bristle. Abdomen grayish, an interrupted blackish 

 median line and large blackish spots on the sides of the second and 

 third segments near the posterior margins, hypopygium prominent, 

 the subanal, phylloid; appendages which extend posteriorly from 

 beneath the third ventral segment are broad and slightly con- 

 tracted near the middle. Legs black, only the extreme tips of the 

 femora and bases of the tibiae yellowish, hal teres yellow. Wings 

 grayish hyaline, veins dark brown, squamae white. Length 7 mm. 

 9 . Similar to cf , front slightly wider, about one and one-half 

 times as wide as each eye. The blackish abdominal markings are 

 as conspicuous as in the male, the end of the ovipositor is grayish 

 and armed with two hook-like spines. Length 8 mm. 



Holotype and allotype, Edgartown, Mass., June 29, 1910; two 

 paratypes, Chatham, Mass., June 30 and July 1, 1904; and two 

 paratypes, Buttonwoods, R.I., June 17, 1912, in the collection of the 

 Boston Society of Natural History. Paratypes from the above 

 localities are also in the Museum of Comparative Zoology, Ameri- 

 can Museum of Natural History, Academy of Natural Sciences, 

 U. S. National Museum, and the collections of Dr. J. M. Aldrich 

 and the author. 



This is one of the most conspicuous of the group of Antho- 

 myids that frequents the grayish sandy beaches of our coast. Its 

 larger and more robust appearance, darker legs and more promin- 

 ent abdominal markings, readily distinguish it from Phyllogaster 

 cordyluroides Stein. 



* 



Dialyta flavitibia Johannsen. 



This species, which has quite recently been described by Dr. 

 O. A. Johannsen, from the Adirondack Mts., N. Y. (Trans. Amer. 

 Ent. Soc, XLII, 394, 1916), is quite widely distributed. I have 

 collected it at Machias, Me., July 21 ; Brookline, July 7; Plymouth, 

 July 28, and Cheshire, Mass, Also at Danbury, Conn., June 15, 

 and Ricketts, North Mt., Pa., Sept. 1. I have received it from Win- 

 chendon, Mass., July 1 (A. P. Morse); Colebrook, Conn., July 20 

 (W.E. Britton), and Kearney, Ont., July 7, 1909 (M. C.Van Duzee). 



Mailed April 7th, 1917. 



