584 GEOLOGICAL SURVEY OF THE TERRITORIES 



tip, the angles not sharply pointed, the vertex roughly punctured in 

 front ; occiput brown ; eyes black behind, clothed with white hairs, a 

 large yellow inferior spot near the margin, and a smaller quadrangular 

 one above it ; thorax black, densely i)ruinose, on each side an inferior 

 yellow spot after the legs, and the indication of some ill-defined paler 

 spots above and before them ; abdomen tapering to tip, black, densely 

 pruinose ; segments each side on the ventral part with a large, reniform, 

 somewhat irregular or divided bright-yellow spot : appendages black, 

 the superiors as long as the two last segments, cylindrical, thicker before 

 the outwardly-bent, pointed tip, beneath with a series of about eleven 

 small teeth ; inferior appendage a little shorter, triangular, broad, 

 recurved ; genital parts in the second segment, with the anterior lamina 

 broad, cut straight, a small notch in the middle of the margin ; hooks 

 yellow, cylindrical, stouter on tip, which is excavated, the interior part 

 of the excavation forming a produced unguiculated process ; feet black ; 

 wings hyaline, with a blackish spot on the nodus, and a larger blackish 

 band from the base to the triangle after the subcosta, somewhat enlarged 

 along the anal border of hind-wings half-way of the whitish membranula; 

 wings milky-white around the basal band and to the nodes; veins black, 

 the first antecubital yellowish ; pterostigma long, oblong, black; ante- 

 cubitals 12 to 14, postcubitals 9 to 10 ; transversal veins in triangle, 2 

 to 3 ; four discoidal areolets, beginning with 5. 



Male teneral. — The yellow color always brighter and more produced ; 

 dorsum of the thorax brown, with an ill-defined, broad, grayish band 

 each side ; on the humeral suture dark-brown ; the crista and sinus 

 black ; the sides of the thorax paler, with four bright-yellow spots, two 

 inferiors oval, bordered with dark-brown, and two superiors triangular, 

 one between the wings, the other near abdomen ; thorax beneath pale; 

 abdomen fulvous, the sutures and margins black ; a large black dorsal 

 band, not reaching the base ; each side oval, yellow spots on the seg- 

 ments ; the two last segments black ; abdomen beneath fulvous : the 

 sides and the tip of the segments blackish ; feet black ; femora brown 

 at base ; the anteriors brown beneath ; wings without the milky-white 

 tinge. 



Female adtdt-^Frmuose and similar to the adult male, combining in 

 some parts the colors and pattern of the teneral male ; labium yellow, 

 with a narrow black line ou the median lobe and the interior margin of 

 the lateral lobes ; labrum yellow, the middle part of the margin brown- 

 ish ; head yellow ; space between the eyes black, the same color pro- 

 duced a little on the front above and on the sides ; vertex brown, black 

 on the sides; eyes behind bright-yellow, two transversal bauds and the 

 part near the occiput black ; the head is exactly as in the teneral male, 

 except a larger black band on the labium ; dorsum of the thorax prui- 

 nose as in the adult male ; the sides less pruinose, with the four yellow 

 spots well defined ; abdomen not tapering, the eighth segment enlarged, 

 pruinose, segments 1 to 9 each Side above and beneath with a large, 

 oval-yellow spot; appendages a little longer as the last segment, black, 

 villose, cylindrical, tapering to the outward bent fine tip ; lobe be- 

 tween them lutrous, black at base ; vulvar lamina exserted, short, 

 notched in the middle, the sides thickened ; eggs protruded, small, 

 yellowish ; feet black ; wings similar to the male, but without the 

 milky- white tinge, the black band ending before the triangle ; 10 ante- 

 cubitals, 11 to 12 postcubitals. 



Female teneral. — Similar to the teneral male ; head similar, black 

 band of the labium broader ; body not liruinose; dorsum of the thorax 

 brown, yellow spots on the sides larger, forming two interrupted oblique 



