OF WASHINGTON, VOLUME XIV, 1912. 147 



Head not more than 1.2 (1.14 to 1.20) times as long as wide, broadest 

 at middle; cheeks rounded abruptly to eyes and gently to near base, thence 

 slightly diverging, forming a neck-like constriction which is about equal 

 in width to greatest distance across eyes, or to about 0.9 the great est width 

 of head; lateral and dorsal surfaces very slightly roughened with shallow, 

 anastomosing lines, each cheek with about three rather stout, dark bristles 

 arising from short tubercles; vertex subconical, produced, overhanging; 

 postocular bristles alone prominent, shorter than eyes, very slightly di- 

 lated and truncate at tip. Eyes about one-third as long as head, their 

 axis of greatest dorsal length nearly coinciding with a line drawn from base 

 of first antennal segment to anterior end of gena. Ocelli of moderate 

 size, equidistant; anterior ocellus borne at apex of produced vertex, pos- 

 terior ocelli distinctly in advance of middle of eyes. Antennae 1.6 times as 

 long as head, moderately slender; segment 1 trapezoidal, broader than long; 

 2 about 1,5 times as long as broad; 3 clavate, twice as long as wide, deeply 

 sinuate on inner side, pedicel curved outward; 4 clavate, narrowed at apex, 

 equal in width to 3, broadest slightly in advance of middle, twice as long 

 as wide; 5 shorter and narrower than 4, of similar form but with straighter 

 sides, pedicel three-fifths of apical width; 6 and 7 oblong, pedicellate, 

 truncate at apex, apical breadth fully twice that of pedicel, 7 about one and 

 one-half times as long as wide; 8 subconical, truncate and slightly narrowed 

 at base. Sense cones of medium size, those on segment 3 about one-third 

 the length of segment; formula: 3, 1-2; 4, 2-2; 5, 1-1+ 1 ; 6, 1-1+'; 7 with 

 one on dorsum near apex. Mouth cone slender, nearly attaining meso- 

 sternum; labium broadly rounded at tip, slightly surpassed by labrum. 



Prothorax somewhat more than half as long as head and (inclusive of 

 coxse) about 2.41 times as wide as long; pronotum non-sculptured, anterior 

 and posterior margins concentric; all usual bristles present, short, dilated 

 and truncate at tip, those on anterior margin about half as long as post- 

 oculars, distinctly shorter thanthepair at the posterior angles, of ten pointed. 

 Pterothorax slightly wider than prothorax, sides straight and converging 

 posteriorly. Wings of fore pair colorless, distinctly broader in basal than 

 in apical half, slightly narrowed at middle, not closely fringed (the posterior 

 margin with only about 52 hairs), subapical fringe double for abq^t nine 

 hairs. Legs rather stout; fore tarsus with a short, stout, acute tooth. 



Abdomen little, if any, broader than pterothorax, broadest toward base, 

 thence rounded gradually to base of tube. Tube about 0.6 as long as head, 

 about twice as long as basal width, and twice as wide at base as at apex, 

 sides straight. ' Lateral bristles of moderate length, knobbed, yellowish, 

 two pointed pairs at apex of segment 9 longer; terminal bristles about as 

 long as tube, brown. 



Measurements of holotype: Length 1.50 mm.; head, length 0.252 mm., 

 width 0.215 mm.; prothorax, length 0.12.X mm., width (inclusive of coxae) 

 0.310 mm.; mesothroax, widtli across fore margin 0.342 mm.; metal hornx, 

 width across hind margin 0.280 mm.; abdomen, width 0.350mm. ; tube, 



