75 



Siphlonurus novangliae, sp. nov. 

 Male. — Head light brown with a black line below the antennae and along 

 the edge of the vertical carina. Thorax brown, shaded with paler on the lateral 

 anterior portion of the mesonotum and with black streaks anterior to the base 

 of primaries; a light ruddy-brown shade before the posterior mesothoracic 

 protuberance which is .also tipped with the same color. Abdomen dorsally 

 deep brown shaded largely with yellow brown on the three posterior segments; 

 in segments 2-7 there are pale yellowish, semitranslucent patches laterally on 

 the anterior portion of each segment. Ventrally segments 1 and 2 are largely 

 brown with a yellow band on posterior margin, the remaining segments yellow- 

 ish with the three posterior segments suffused with brown; there is also a series 

 of brownish lateral patches, largest and most distinct on the anterior seg- 

 ments, reduced to mere streaks or obsolete on the posterior ones; forceps deep 

 brown with basal plate yellow, especially on interior side. Fore leg brown, paler 

 at base of femur and on coxae and with joints of tarsi marked with black; pos- 

 terior legs yellow brown with the tip of femur and the tarsal joints slightly 

 marked with brown. Setae dirty gray with black annulation. Wings hyaline 

 with black venation and in certain lights with a very faint amber tinge over 

 the entire surface. 



Female. — Very similar to $ but slightly paler in coloration. Length of body 

 13 mm.; of fore wing 13 mm. 



Holotype. — $ , Brookline, Massachusetts, June 17 (C. W. Johnson); in the 

 collection of the Boston Society of Natural History. 



Allotype. — 9, same data. 



Paratypes. — 2 $, Darien, Connecticut, June 11 (C. W. Johnson); 3 ?, 

 Brookline, Massachusetts, June 11, 17, in the collection of the Boston Society 

 of Natural History and No. 773 in the Canadian National Collection, Ottawa. 



The species should be readily recognized by its $ genitalia, the 

 penes being barb-shaped at the base with broad truncate apices 

 (PL 6, fig. 3); it is distinguished from typicus Eaton, a New England 

 species, by the lack of a brown shade in the axillary fold of the 

 fore wing. 



Siphlonurus rapidus, sp. nov. 

 Male. — Face pale grayish with broad dark transverse band below the 

 antennae; thorax dull olive brown with a darker mid-dorsal stripe and ruddy 

 brown shading anterior to and on the mesothoracic posterior tubercle; anterior 

 to the wing roots is a pale whitish-yellow shade containing a deep purple-brown 

 streak. Abdomen dorsally with the first seven segments deep purple brown, 

 the anterior margins of segments 3-7 being semitranslucent pale whitish yellow; 

 the three posterior segments are light brown shaded laterally and anteriorly 

 with pale yellowish. Ventrally pale yellowish with a dark purple brown irreg- 

 ular medioventral stripe; anterior segments largely shaded with purple brown; 

 forceps light smoky with pale yellow basal plate ; setae dirty white ringed with 

 blackish. Fore leg pale brownish, hind legs dirty white, with the joints marked 

 with purple brown and in some lights with a faint purplish shade beyond the 

 middle of the femora. Wings hyaline with black venation. 



Female. — Rather paler than the $ and with the medioventral stripe reduced 

 to series of patches. Length of body 10 mm.; of fore wing 12 mm. 



Holotype. — $ , North Reading, Massachusetts, June 10; No. 774, in the 

 Canadian National Collection, Ottawa. 



Allotype. — ?, Jaffrey, New Hampshire, June 11; in the collection of the 

 Boston Society of Natural History. 



