204 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxvi. 



bltu-k: (x'olH present, small, frequently more or loss hidden by irregu- 

 lar dai-k-red local pigmentation, placed well forward upon an elevation 

 between the eyes; postocular bristles quite long. Mouth cone short 

 and blunt; la})rum not constricted abruptly. Antennae very large and 

 long, fully two and one-half times as long as head, with a semicircular, 

 shelf-like support below^ bases; bases approxmiate; elevation between 

 them extending half the height of first segments; relative lengths of 

 seo-ments as follows: 



9.9 



Segment one large and cylindrical; two cup-shaped; three very,) 

 slender at base, clavate; four to seven also slender at bases, decreasing ; 

 gradually in diameter and length of stalk; eight enlarging to one-third 

 its length and then tapering to a sharp point. Color shading gradu- | 

 ally from concolorous with head at base to dark brown at tip. Spines ] 

 and sense cones long, slender, and quite conspicuous. Head clear, pale 

 yellow to brownish yellow. 



Prothorax and pterothorax (in short-winged specimens) along dorsal 

 line, each approximately as long as head; width of prothorax across i 

 coxa? nearl}'^ twice its length, its sides indented considerably above 

 them. Anterior marginal spines wanting; others present as usual (at | 

 angles, mid-lateral and posterior marginal) long, slender, and blunt. 

 Mesothorax approximately as broad as prothorax; in long- winged 

 specimens about one-fourth longer than in short-winged, and also 

 slightly fuller. Legs short and moderately stout; fore femora but 

 slightly enlarged and tarsi armed with a small tooth; one long, erect, \ 

 kno])bed spine upon the back of each femur. Legs yellow; femora ^ 

 shaded with l)rown; in darker specimens femora more strongly shaded. 



Abdomen large and heavy; fore angles abrupt; about one-half as i 

 wide as long; nearly cylindrical to seventh segment, then sides curve 

 roundly to })ase of tube. Tube as long or slightly longer than head, 

 about one-third as broad in middle as long, more slender in outer than ^ 

 in basal half; terminal spines only about two-thirds as long as tube; 

 those on sides of abdomen quite long and prominent, knobbed. 



Thorax and abdomen uniform in color, abruptly darker than head 

 and legs, ranging from yellow-brown to dark brown, with consideral)le 

 dark red, irregular, hypodermal pigmentation. 



Described from ten females, eight long and two short winged. 



Cotype.—Q^X. No. 6335, U.S.N.M. 



Male. — Males about six-sevenths as large as females. Relative 

 lengths of antennal segments as follows: 



The prothorax is a little wider than the mesothorax. Fore f(>inora 



