130 JAMES WATERSTOX. 



Antennae : length, 1-25 mm. Scape narrow (4 : 1), with subparallel sides on basal 

 half, and widest at about three-quarters, with a row of six to eight moderately long 

 bristles on the mid line externally, and a few above and on the dorsal edge ; subapical 

 median bristle rather longer than greatest width of the joint ; on the inner aspect, 

 three or four short bristles in subdorsal row, and six or seven longish bristles all fringing 

 the ventral edge and ventral or subventral in position ; subapical bristles, as on outer 

 .aspect, if anything stouter. Pedicel (3 : 1) narrow at the base, distal edge sloped up, 

 not transverse. First ring joint cup-shaped, large, its lower edge hardly longer than 

 the upper ; second narrow, wedge-shaped, but as broad as the first ; third narrower, 

 wedge-shaped, with a broad basal edge, fitting into the first funicular, which is much 

 ■cut away posteroventrally. Funicle : first joint very long, six-sevenths of the scape ; 

 the three joints in the proportion 19 : 15 : 12, and club 9 : 9 (of which the spur is 2) ; 

 in the same ratio the width varies from 4 (first funicular) to about 5 (first segment of 

 club). Pedicel and funicle thickly set with stout bristles ; the short stout capitate 

 or mushroom-shaped spines at the apex of the funicular joints strongly developed. 

 8ensoria (short, with free flanges, as long as or exceeding their base) : on the first 

 joint of funicle, 11 ; on second, 9-10 ; on third and first of club, 13. The second 

 club segment bears four sensoria externally, while on the inside there are about five 

 rows of strong sensory bristles (twenty-four in all) rising from clear pustules. 



Mouth-jjarts : The mandibles though of the usual bidentate pattern, are peculiar ; 

 on the outer aspect are two basal swellings (the smaller more ventral), from which the 

 .surface slopes abruptly to the lower edge and the teeth ; the lower tooth large, 

 acute, with straight edges ; the upper (inner) has the sides swollen basally, and the 

 upper swelling might almost be described as a third rounded tooth, whose edge is 

 minutely denticulate or undulate ; three stout external bristles in a transverse 

 median row, while a fourth stands subventrally at one-half, on the inner aspect, 

 Stipes, outer lobe of first maxilla and labium all elongate ; the labium, in particular, 

 narrow, wedge-shaped (5 : 2) ; maxillary palpus twice as long as labial, with two 

 stout hyaline spines, one apical and the other beyond two-thirds from the base ; 

 labial palpus likewise with two spines, apical and subapical in position. The lateral 

 bristle of the stipes, at one half, is longer than the palpus itself ; the median bristle 

 ■on the labium is almost on the base line of the palpi, and of the same length ; there 

 are two short apical hyaline spines on the outer lobe of the maxilla, and numerous 

 bristles on the inner. Lingua short and broad, with four cells. 



Thorax flat ; mid lobe and scutellum on same plane. Sculpture uniformly 

 coarsely raised-reticulate, except along the posterior half of the parapsidal furrows 

 (narrowly), the mid line of the pronotum (rather broadly), and in front of the pro- 

 thoracic spiracle, where the pattern is finer. The mid lobe extends slightly beyond 

 the downwardly inturned side-lobes, so that there is a distinct lateral gap between 

 pro- and meso-nota. Pronotum collar-like, porrect ; spiracle in a postero-lateral 

 thickened prominence, behind and below which is a smooth rim sweeping downwards 

 and anteriorly, so that the prominence is more than half encircled. Flaps of the 

 pronotum long, with very oblique posterior edges ; medianly the posterior edge is 

 bare ; four long bristles (2 : 2) nearer the sides and one at each spiracle. Prosterimm 

 pentagonal, truncate posteriorly, elongate in front, bare, with coarse pattern like the 

 cpisternites. Mid lobe with four bristles (2:2); the anterior pair more approxi- 

 mated at about three-quarters from the suture ; the second pair near the suture, 



