158 PROCEEDINGS ENTOMOLOGICAL SOCIETY 



blackish brown, the latter paler apically, where it is concolorous with pedi- 

 cel of 3, the remainder of antenna almost black; extreme apex of all femora, 

 middle portion of fore tibiae, and the fore tarsi pale yellowish, the remain- 

 der of legs concolorous with body; tube jet black, opaque. 



Head about as broad as long, rounded in front, broadest midway be- 

 tween eyes and base, vertex evenly declivous; lateral and dorsal surfaces 

 without sculpture, set with a few short, stout, brown spines, which are 

 raised upon barely visible tubercles; postocular bristles alone prominent, 

 a little more than one-third as long as head, nearly pointed, postocellar 

 bristles minute. Eyes small, not protruding, subquadrangular, on ventral 

 surface of head rounded posteriorly and not prolonged; interval between 

 eyes about twice their own dorsal width. Ocelli moderate in size; anterior 

 ocellus scarcely overhanging; posterior ocelli much more distant from each 

 other than from the anterior ocellus, nearly contiguous to eyes and slightly 

 posterior to their anterior third. Antennae about twice as long as head, 

 of nearly identical structure with those of the preceding species. Mouth 

 cone broad, nearly attaining posterior margin of prosternum; labium semi- 

 circularly rounded at apex, subequal in length to lab rum. 



Prothorax about 0.64 as long as head and (inclusive of coxa?) about 2.4 

 times as wide as long; pronotum non-sculptured, with slight median thick- 

 ening; anterior and posterior margins concentric; all usual bristles present, 

 all except the two pairs near the posterior angles greatly reduced in size, 

 midlaterals longer, inner posterior pair half as long as the nearly pointed 

 outer pair. Pterothorax with sides nearly straight, converging posteriorly. 

 Fore wings of nearly equal width throughout, about ten times as long as 

 wide, without double, subapical fringe on posterior margin, lightly washed 

 with brown, darker at base. Legs of medium length, moderately stout; 

 fore tarsi armed with a long, slightly curved, acute tooth. 



Abdomen moderately slender, about 1.3 times as broad as prothorax, 

 broadest at about segment 5, thence rounded evenly to base of tube. 

 Tube fully as long as head, about 2.5 times as long as basal width, 

 abruptly constricted at apex, where it is half as w r ide as at base; inter- 

 mediate portion tapering only slightly. Lateral bristles on segments 7 

 and 9 nearly as long as tube, brownish yellow in color; terminal bristles 

 about half as long as tube. 



Measurements of holotype: Length 1.40 mm.; head, length 0.198 mm., 

 width 0.196 mm.; prothorax, length 0.127 mm., width (inclusive of coxa?) 

 0.308 mm.; pterothorax, width 0.348 mm.; abdomen, width 0.396 mm.; 

 tube, length 0.204 mm., width at base 0.081 mm., at apex 0.041 mm. An- 

 tennal segments: 1, 33 M ; 2, 57 M ; 3, 60 M ; 4, 53 M ; 5, 54 M; 6, 54 M ; 7, 42 M; 

 8, 36 M; total length of antenna, 0.3Sanm.; width at segment 4, 0.031 mm. 



Described from 1 female taken by Mr. Hart on huisache 

 (Acacia farnesiana Willd.), at Brownsville, Texas, June 29, 

 1908. 



