68 Bulletin American Museum of Natural History [Vol. XLII 



quite as long as the first two together but slightly more slender and tapering; each 

 bears a few slender seta?, the terminal segment being highly sensory and providedSvith 

 a group of sense-cones at its extremity. Articulating maxillary piece well developed. 



Labium just exceeding the palpifer of the maxillae; submentum small; mentum 

 somewhat cordiform; palpiger dome-shaped, two-thirds the mentum in length, bearing 

 a longitudinal row of three dorsal seta? on each side of the median line; labial 

 palpus with first segment short, second segment less than three times as long and 

 bearing sense-cones at its tip and a number of setae at its base; ligula present and a 

 little longer than the first segment of the palpus. 



Prothorax with sides slightly rounded, of the same width as the head; anterior 

 and posterior of pronotum non-chitinized; sagittal line present; prosternum with 

 two fairly large sclerites in front of the coxae touching along the median fine; meso- 

 and metathorax shorter than the prothorax, and the metathorax narrower than either 

 thoracic segment; sclerites of mesonotum and metanotum fairly large, the former 

 crescent-shaped as a whole, and the latter irregular; two inconspicuous, narrow 

 sclerites are present in the pro-mesotergal conjunctivum; sagittal line prominent. 

 Mesothoracic spiracles mounted on a small tubercle in each antero-lateral angle. 



Legs fairly long, a little longer than the thorax is wide; coxae transverse, grooved 

 laterally to receive the femora; femora a little longer than the tibiae; tarsi well 

 developed, claw-like, about as long as the latter and bearing two inner setae; the 

 two anterior coxae are closer together than the four posterior coxae, which are about 

 the same distance apart. 



Abdomen with eight segments distinct and very slightly narrowed caudally, 

 ninth and tenth segments rudimentary. The first seven tergites similar and separated 

 by a conspicuous intersegmental membrane; each of the former has three transverse 

 folds while the latter has only two. The first tergite bears a pair of subrectangular 

 chitinized patches on its praescutum, while there is a pair of small oval, chitinized 

 patches on the praescuta of the next six segments. Lateral tubercles are not clearly 

 defined but there is apparently one large one on the segment and two smaller more 

 pointed ones on the membrane following. On the second fold of each of the seven 

 segments, a transverse row of four tubercles, each bearing a seta, may be seen. A 

 pair of very inconspicuous spiracles present on each of the first seven segments The 

 sternites are not chitinous and have folds corresponding with those of the tergites. 

 The third to the seventh each possess a pair of prominent tubercles which resemble 

 prolegs and are furnished with a group of recurved spines on their ventral surface. 

 The eighth tergite represents the superior valve of the stigmatic atrium. As the larvae 

 of this genus belong to the same type of pseudo-metapneustic larvae as Cymbiodyta, 

 a redescription of the atrium seems unnecessary. 



Full-grown Larva. — Length, 6-8 mm.; width at the mesothorax, 1.80 mm. 

 Gray or dirty white and, when not too dirty, somewhat peppery, but not so notice- 

 ably as in Cymbiodyta. A transverse row of dark spots is noted on the tops of the 

 abdominal folds in some larvae, especially those which have just molted. 



Head, dorsally, 0.768 mm. wide and 0.624 mm. long. Serrate flap of labrum 

 mostly lost, except tooth at right, and frontal angles blunt. Appendage of second 

 segment of antennae much smaller in comparison with the third segment. Serrations 

 of the anterior teeth of the mandibles lost and those of the inner surface of the anterior 

 piece very indistinct or lost The first segment of maxillary palpus about one-half 

 the second. A row of four stout dorso-lateral setae on each side of the mentum and a 



