722 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxm. 



and hind fringes very strong, concolorous with the hind fringes of 

 the fore Avings. Legs rather short and thick, the fore pair shortest 

 and hind pair longest. Coxa? and femora brown; tibia? brown at 

 base but shading out more or less to very light transhicent yellow at 

 distal ends; posterior tibia armed with a pair of stout spines at the 

 tip; tarsi all light colored; coxa.\ femora, and tibia? all reticulated, 

 the femora very strongly so, and bearing strong spines. 



Abdomen rather elongate-ovate, pointed at tip; reticulated but 

 little on the middle of the dorsal segments but very sti'ongly so on 

 the sides and on the pleural plates; ventral surface not reticulated. 

 Across each of the second to eighth dorsal plates, inclusive, some- 

 Avhat back from its {Ulterior margin, runs a very noticeable ii'regular 

 thickening. On the hinder margin of the eighth dorsal plate is a 

 transverse row of long comb-like teeth, which, on account of their 

 color, are very inconspicuous and can only be seen with difficulty 

 ev^n with the high powers of the microscope. On each side of each 

 of the second to eighth ventral plates inclusive are three very notice- 

 able spines, placed at about the middle of the segment. There are 

 conspicuous spines on nearly all the dorsal segments; those on seg- 

 ment ten being for the most part small and weak; while those near 

 the posterior dorsal margin of segment nine are very large and 

 strong. The areas on the dorsal plates, which are not reticulated, 

 bear numerous minute sjDines. Abdomen much darker colored than 

 head or thorax, usually with the tip much lighter, the apical segment 

 being about as light as the thorax. In many specimens a band of 

 bright red hypoclermal pigmentation is to be seen in segments one, 

 two, and three of the abdomen ; in nearly all specimens a small patch 

 of similar pigment is noticeable at the tip of segment ten and usually 

 protruding somewhat from it. Redescribed from seven specimens. 

 I have redescribed this sex as Giard's description does not seem to 

 be sufficiently complete. 



Male. — Length, 1.07 mm. ; width of head, 0.18 mm. ; width of pro- 

 thorax, 0.17 mm. ; width of mesothorax, 0.28 mm. ; width of meta- 

 thorax, 0.25 mm. ; greatest width of abdomen, 0.24 mm. General 

 color much like that of female. Relative lengths of antennal seg- 

 ments : 



123 4 5 678 

 5 10 13 15.5 8.5 7 4 9 



Wings relatively shorter than in the female, not reaching the end 

 of the abdomen. Abdomen blunt at the end, with two pairs of very 

 large and characteristic dark-colored spines on the posterior part of 

 the dorsum of the ninth segment, the smaller of these two is situ- 

 ated immediately behind the larger and the spines of both pairs are 

 close together, one on each side of the middle line of the abdomen. 



