40 OHIO STATE ACADEMY OF SCIENCE. 



body; the tibia being nearly three times the length of the tarsi, and 

 bearing a pair of strong spines on the distal end. Numerous hairs are 

 borne by the tarsi but no noticeable digitules. A pair of knobbed 

 digitules is borne by the long single-toothed claws. 



The eggs are long-elliptical, golden-brown, rather firm, measuring 

 .3 mm. X .15 mm. 



Male (adult) is an active, well-constructed insect; the thorax 

 contsituting- one-half the length of the individual. Measurements: 

 From tip of head to tip of abdomen, .85 mm.; wing expanse, 2.8 mm. 

 From tip of head to tip of folded wings along dorso-median line, 

 1.5 mm.; length of wing, 1.25 inm.; width of wing, .55 mm.; length of 

 balancers, .1 mm. Caudal filaments; two about 1.25 mm., and two about 

 1mm. in length. Front legs; femur .25 mm., tibia .35 mm., tarsus, 

 .12 mm., claw .03 mm. in length. Hind legs; femur .3 mm., tibia .4 mm., 

 tarsus .13 mm., claw .03 mm. in length. Antennae are 1 mm. in length, 

 the joints measuring; 1st, 45 mmm., 2nd, GO, 3rd, 160, 4th, 150, 5th, 135, 

 6th, 120, 7th, 96, 8th, 75, 9th, 63, 10th, 90. Formula: 3, 4, 5, 6, 7, 

 10, 8 (9, 2,) 1. 



Color: Head, dark reddish-brown; eyes, blackish; thorax, reddish- 

 brown except dark, chitinous parts; abdomen light-brown tinged with 

 yellow. Antennae, reddish-brown; legs, brown to olivaceous with dark- 

 brown tarsi. Caudal filaments, white; wings, semi-transparent with 

 iridescent rose-tint in strong light. Balancers, darker, slightly chiti- 

 nous on costal margin, bearing one long, hooked claw which fits into 

 a pocket in the wing. 



Although the head is very small and much reduced, and bears four 

 reddish ocelli, the thorax is very large and well developed and bears 

 a black, shield-shaped chitinous plate on the meso-scutum, from which 

 three dark, chitinous bands extend to the anterior margin of the thorax. 



The legs are long and hairy for their entire length; the tibia bear 

 a pair of strong spines on their distal extremity; the tarsi are armed 

 with numerous spines; the claws are long and curved, and bear a sharp 

 denticle on the ventral margin, near the tip. Two knobbed digitules 

 are present, extending beyond the tip of the claw. 



The males were found emerging from the pupa-cases from 

 April 13 to 18, and taking wing readily. 



The females were found, during the winter, under loose bark 

 on the trunks and larger limbs of Platanus occldentalis on the 

 campus of Ohio State University, at Columbus. Not abundant. 



A Chalcid parasite was reared from specimens collected in 

 February. 



