28 PROCEEDINGS OF THE NATIONAL MUSEUM vol. los 



Smallest specimens which obviously were sexually mature were 

 females 11 mm. long with one or two eggs in the ovisac and males 

 12 mm. long. In small females, 11-12.5 mm. long, the ovisac is 

 relatively shorter than in full-grown ones, extending only the length 

 of 2K to 3K abdominal segments. 



Type locality: A pond in Lincoln County, Wash., about 8K mOes 

 southeast of Creston, and about 50 yards north of U. S. Highway 2. 

 Elevation about 2,400 ft. above sea level. 



Type specimens: One male holotype (USNM 100912) and 8 male 

 and 8 female para types (USNM 100913) have been deposited in the 

 U. S. National Museum. 



Differentiating characters: Male: The clasping antenna of the 

 male has an extensive verrucose area on its anteromedian and medio- 

 anterior sides and a prominent rounded bulge near the upper part of 

 the verrucose area. The proximal article is more or less pronouncedly 

 geniculate in lateral view. The degree of geniculation varies with 

 muscular contractions, but is constant enough to constitute a specific 

 character. 



Female: The second antenna of the female, near the junction of 

 the middle and terminal thirds, has a medially du'ected spur, distal 

 to which the antenna tapers to an inwardly curved point. No North 

 American species described to date has this feature, although it occurs 

 in the South American Br. pollicifera Harding, 1940. 



The female has a pair of conspicuous papUlose protuberances on the 

 dorsolateral sides of the head. This hornlike outgrowth is either 

 absent or rudimentary on other North American species, and has not 

 been recorded from exotic species. 



Dorsolateral lobes, of conical shape, occur from thoracic segment 

 6 or 7 to segment 11, that on segment 10, or sometimes on segment 11, 

 being the largest. Other species lack such lobes, or have them 

 differing as to number, or arranged in different sequences as to size. 



Color of living specimens: Br. cornigera, new species, is more 

 brightly colored than most species of the genus in western North 

 America. The females are more brightly colored than the males, 

 and their coloration is less variable. Indeed, the variation in shade 

 and intensity of color of the males is so great that it is difficult to 

 describe their colors adequately or briefly. 



Male: The over-all color varies from a burnt orange to a pale 

 greenish or gray-green; occasionally they are almost colorless except 

 for the greenish head and pale green appendages. The antennule is 

 pale yellow, the basal article of the clasping antenna may be dark 

 blue-green, yellow-green, or nearly colorless; the distal article yellow 

 to orange with greenish punctations on the lateral side, and gray on 

 the roughened area near the tip. The front and top of the head are 



