DESCRIPTIONS AND DETERMINATIONS OF SPECIES 63 



six to eight spines. Fifth to seventh segments each with a continuous 

 transverse row of about thirty spines. Eighth segment with a median 

 group of four spines and a single spine near each posterior-lateral angle. 

 Ninth segment with several short spines along the lateral margins ; the 

 succeeding segments, except the ninth, each with a pair of spines near 

 the middle of the lateral margin of the segment, these spines on the sev- 

 enth and eighth segments being longer than on the others. 



Description of the Male. — Total length 1.55 mm., length of head 

 .375 mm., length of prothorax .15 mm., length of metathorax .075 mm., 

 length of abdomen .95 mm., width of head across temples .5 mm., width 

 of prothorax .35 mm., width of metathorax .4 mm., width of abdomen 

 .75 mm. 



Head with the anterior margin nearly straight, with no median notch, 

 and produced into trabecula-like processes in front of the antennae. 

 Antennal sinuses deep and sharply angular. Ocular projections small, 

 not extending beyond the extreme margin of the temples, which are 

 smoothly rounded and meet the occipital margin without an angle. Oc- 

 cipital margin nearly straight, slightly emarginate where it is met by the 

 occipital bands. Antennal bands narrow, widening somewhat at the front 

 of the head, where they are separated from each other only by a very 

 small clear area, and interrupted across the base of the antennae, not 

 reaching the ocular blotch. Occipital bands short, united at their bases 

 by a narrow band. Several short hairs on the anterior margin and tem- 

 ples, and one rather long hair on each side of the occipital margin. 



Antennae large and backward-pointing, reaching somewhat beyond 

 the occipital margin of the head ; the first joint large and as long or per- 

 haps a trifle longer than the second and third combined. Third joint a 

 little longer than the second, both being slightly curved. First joint with 

 a row of four short spines on the dorsal side, second and third joints with 

 several rather long hairs, the third with two short teeth on the inner mar- 

 gin at the distal end. 



Thorax about one and one- fourth times as wide as long. Prothorax 

 trapezoidal in shape, widest across the posterior margin, which is nearly 

 straight, and with a short spine at each posterior margin. Metathorax 

 about half as long as the prothorax and a trifle wider, the lateral margins 

 curved, converging slightly, and bearing several short spines, the pos- 

 terior margin nearly straight but with a slight median emargination and 

 with a median group of six spines. Legs normal. 



Abdomen oval, widest across the anterior margin of the fourth seg- 

 ment and with a narrow hyaline band at the margins. First segment with 



