862 



Charles Paul Alexander 



when head is retracted, tips of maxillae projecting from prothoracic orifice. Seventh 

 abdominal segment with a transverse fringe of stiff hairs on the sides, these directed laterad 

 and slightly caudad. Body noticeably constricted just before last segment. Spiracular 

 disk (Plate XLII, 195) surrounded by five lobes, and in superficial appearance decidedly 

 eriopterine rather than hexatomine; ventral lobes the longest but still much shorter than 

 is usual in this tribe, slightly divergent, inner face with a double, V-shaped, dark brown 

 mark, inner arm of V narrow, outer arm more expanded, especially at proximal ends, one 

 large inner and two smaller outer sensory bristles at apex of V; lateral lobes narrow, with a 

 V-shaped mark similar to that of ventral lobes but narrower and darker; dorsal lobe broad, 

 the inner face indistinctly lined with parallel, dusky, longitudinal stripes; all five lobes 

 surrounded by a fringe of long, delicate hairs lying just outside brown marks, these hairs 

 longest at tips of lobes and continuous around disk. Spiracles circular, rather widely sepa- 

 rated; ring broad, light yellow, narrowly margined outwardly with black. Anal gills four, 

 short and stout. 



Head capsule (Plate XLII, 191) very dissected, consisting of six elongate slender plates, 

 three on either side, articulating at a point laterad of mental plate. Labrum (Plate XLII, 

 192) large; anterior margin indistinctly trilobed, the median lobe hairy; on the ventral, or 

 epipharyngeal, surface, on either side, a slender cylindrical papilla, subhyaline, directed 

 cephalad; sides of epipharynx with a tuft of long setae. Mentum chitinized, consisting of 

 two lateral rods and an anterior transverse bar which is finely ribbed with parallel lines. 

 Immediately dorsad of mentum two roughened papillae (prementum) directed cephalad; 

 esophagus retrorsely roughened. Antenna (Plate XLII, 193) stout, in caustic-potash prepa- 

 rations almost hyaline, tipped with an elongate cylindrical lobe distad of which is a small 

 setiferous tubercle with two long, delicate setae exceeding antennae in length. Mandible 

 (Plate XLII, 194) powerful, very deep at base, produced into an acute, strongly curved tip; 

 just beyond midlength a very large, acute tooth which is about one-third length of apical 

 point, in its angle a small, hyaline, flattened, leaflike blade with a truncated apex; basad 

 of large tooth two or three gradually smaller teeth. Maxilla with outer lobes stout, broad 

 at base, gradually narrowed to tip, which is cut off by a constriction into a semi-oval struc- 

 ture; palpi on inner dorsal face of maxillary lobe at about midlength, short, semi-globular, 

 with abundant sensory papillae; when head is completely retracted, the long, pale, sUghtly 

 divergent tips of maxillary iobes projecting from orifice. 



Pupa.- — -Length of cast skin, about 6 mm. 



General coloration dark brown; pronotal breathing horns almost black, with apical fourth 

 conspicuously light yellow; abdominal incisures pale. 



Cephalic crest large and prominent, with three long setae on outer face. Labrum blunt 

 at apex. Labial lobes with a blunt point on either side, these directed proximad and caudad. 

 Maxillary palpi broad at base, suddenly narrowed to the long, cylindrical tip, which is 

 darkened. Antennae rather short. Pronotal breathing horns (Plate XLIII, 196) stout, 

 short, almost straight, broad basally, tapering gradually to the blunt tips. Wing sheaths 

 very short and broad, ending before tip of second abdominal segment. Leg sheaths short, 

 extending to just beyond base of fourth abdominal segment; all the tarsi ending about on a 

 level, or outer sheaths a little_the longer. j 



