70 Journal of Entomology and Zoology 
Body very long and slender, glabrous; spiracular disk obliquely truncated, sur- 
rounded by four slender naked lobes; mentum with three subequal primary 
teeth and a much reduced lateral tooth on either side. Dicranoptycharia. 
PUPAE 
1. Pronotal breathing-horns branched; aquatic. Antocharia. 
Pronotal breathing-horns not branched; semiaquatic or terrestrial. 
2. Pronotal breathing-horns distinct, elongate-cylindrical. Rhamphidaria. 
Pronotal breathing-horns apparently lacking, microscopic. Dicranoptycharia. 
THE SUBTRIBE DICRANOPTYCHA 
A Key to the Species of Dicranoptycha 
LARVAE 
1. Spiracular disk with the dark markings less extensive; the mark of the lateral] 
lobes not contiguous with the spiracle or the triangular area on the disk; dorsal 
marking indistinct or lacking. D. winnemana Alex. 
Spiracular disk with the dark markings more extensive; the mark of the lateral 
lobes suffusing the ventral inner margin of the spiracle and usually closely ap- 
proximated or nearly contiguous with the triangular area on the disk; dorsal 
marking black, transversely rectangular. D. minima Alex. 
Description of the Species. 
DESCRIPTION OF THE SPECIE3 
1916 Dicranoptycha winnemana Alexander; Prec. Acad. Nat. Sci. Phila., pp. 500, 501; 
Pl. 25, fig. 12. 
T_arva—tLength, 20-22 mm. 
Diameter, 0.9-1.1 mm. 
Coloration varying from white to almost black depending on the nature and 
amount of the food eaten which shows clearly through the transparent integument. 
The fat-bodies likewise show through and give a white color to the larva especially 
after death. 
Form very elongate (fig. 1), body terete; integument very glabrous, transparent 
and glassy. Prothoracic segment a little longer than the mesothorax which, in turn, 
slightly exceeds the metathorax. The intermediate abdominal segments are elongated. 
The basal ring of sternites two to cight bears a transverse band or area of micrcscopic 
chitinizd spicules, the one on the eighth segment snlit lengthwise by a capillary line. 
A similar band occurs in the same position on the dorsum of the eighth segment but 
the pleural region is devoid of such a band. 
Spiracular disk (fig. 8) moderate in size, obliquely truncated, surrounded by four 
lobes, a pair of small, slender, lateral lobes and short, broader ventral lobes. The 
usual dorso-median lobe is lacking but its position is indicated by a gently rounded 
convexity. The inner face of the lateral lobe bears a narrow semi-lunate black mark 
with the concavity toward the spiracle, the proximal end acutely pointed. The ventral 
lobes bear a similar but smaller subrectangular black mark. A pale and usually 
indistinct dusky mark occupies the inner face of the dorsal lobe. On the disk between, 
and slightly below the level of, the spiracles is a large brown triangular or V-shaped 
mark. The spiracles are small. separated from one another by a distance equal to 
about 2.5 to 3 times the diameter of one; the center-piece of the spiracle is black, the 
