divided on the dorsal portion, the siiiracles in each gradually smallc- ;ui(l 

 situated at the lower end of the dorsal division. Last segment obtusely 

 ovate, scarcely plicate dorsally and without spir;icle, the anal opening ven- 

 tral and longitudinal. 



Spiracles. Of these there are nine on each side, all functional; 

 the first is situated at the side of the prothoracic segment, the others in 

 the first eight ventral segments; they gradually decrease in size from the 

 first to the last. 



Legs. On the three thoracic segments nearly equal, witii four articu- 

 lations, the femoral piece longer, the tibia terminated by a small cleft 

 claw, the under portion of which is short; surface of legs rather hairy. 



Head very deeply inserted in the prothorax; the exposed portion 

 dark chitinous, the internal ovate flattened on the underside, the anterior 

 margin of head forming a thickened projection, the clypeus hemi-hexa- 

 gonal with a chitinous border. 



Lahrum transverse, ciliate, the anterior margin arcuate. 



Mandibles stout, pyramidal, the apices chisel shaped, transversely 

 wrinkled above; behind the base of the mandibles an oval tubercle of the 

 side of the head. 



Maxillae with a large, irregularly quadrangular, basal piece, surmount- 

 ed by an oval lobe, the inner edge of which is truncate, the surface densely 

 ciliate; the palpi 3-jointed, the first largest, obovate, second narrower and 

 shorter, the third slender, subuliform. 



Mentum trapezoidal, the sides arcuate, apex truncate, face obliquely 

 impressed each side; the submentum broader, of the same general form; 

 palpi similar to the maxillary, but much swollen, the ligula concealed by 

 them, semi-circular, the palpi and ligula rather densely pilose. 



Antennae small, situated near the base of the mandibles above the 

 oval subercle, 3-jointed, the first joint short, cylindrical, second narrower 

 and longer, the third small, slender and bisetose at tijD. 



This larva reproduces the form and nearly all the details of Apate 

 capucina as published by Ferris (Ann. Fr. 1850, pi. XVI, I). The an- 

 tennae are there described as 4-jointed, but the conical basal jiiece as 

 described seems rather to be the protuberant connecting membrane. The 

 other parts figured by Ferris are rather diagrams than real illustrations. 

 The accompanying figures will give a fair idea of the imago and the 

 larva, obviating the necessity for a very detailed description. 



The head of the larva is remarkable in its size and the perfection of 

 the mouth parts. It is entirely without trace of visual organs, although 

 it is probable that the post-mandibular tubercle becomes the eye in the 

 imago. 



It is probable that the larva figured on the accompanying plate is 

 fully grown. Two specimens were kindly sent me by Mr. W. G. "Wright, 

 one of which will be placed in the Museum of Comparative Zoology at 

 Cambridge, for the use of those who have occasion to study the instructive 

 series of larvae there accumulated." 



The illustrations accompanying Dr. Horn's article wexe not 

 particularly satisfactory, being too diagrammatic and somewhat 

 out of proportion. He probably had only alcoholic j^reparations 

 of the larva from which to work. 



