414 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



and the numerous hairs which are still compressed in the 

 enveloping sheath. The legs are longer and more slender 

 than in the larval stage. 



The pupa at this stage is of a grayish purple color, and 

 the body is covered with short fine hairs. 



6. The Adult Male (fig. 5). — The following description 

 was drawn from living specimens: — 



Measurements: — Body, from tip of head to tip of abdo- 

 men, 3 mm.; caudal lobe, .5 mm.; from tip of head to end 

 of folded wing, along dorso-median line, 5 mm.; antennse, 

 3.48 mm.; wings, length, 3.4 mm., width 1.4 mm.; front 

 legs, femur, .6 mm, tibia .9 mm.; tarsus .3 mm., claw .07 

 mm.; hind legs, femur .8 mm., tibia .1 mm., tarsus .33 

 mm., claw .08 mm. 



Color: — Head, dark olivaceous; eyes, blackish; thorax 

 olivaceous; abdomen, light olivaceous with yellowish tinge; 

 caudal filaments white; legs, olivaceous; wings, semitrans- 

 parent, smoky, with iridescent rose tint in strong light. 



Balancers stout, with three long hooked claws fitting into 

 socket in wing (fig. 5, «). 



The head is very much reduced, in fact, it seems to serve 

 simply as the seat for the eyes and the antennas. It is longi- 

 tudinally bisected by a distinct groove, ending posteriorly 

 on the ventral side in a triangular depression occupying the 

 position of the obsolete mouth-parts. On each lateral half 

 of the head there are seven ocelli arranged in a transverse 

 line just back of the antennas. Posterior to the middle one 

 of these ocelli there is, on either side, a single large ocellus. 

 The antennse are ten-jointed, formula, 4, (3, 5, 6,) 7, 8, 9, 

 10, 2, I. All segments have numerous hairs. 



The legs are very slender, covered with rather long slen- 

 der hairs for their entire length. The tarsi are armed on 

 either side with a ventro-lateral row of short stiff spines. 

 The tibia have also a few short spines on the ventro-lateral 

 margins of the distal half. The claws are rather slender, 

 with a slight tooth on the ventral side near the tip. The 

 two digitules are present at the base, though not perceptibly 

 knobbed. 



