126 Psyche JAugust 
Trigonometopus vittatus Loew. 
A single specimen before me, taken by Mrs. A. T. Slosson at 
Biscayne Bay, Florida, agrees with Loew’s description in most 
particulars. The wing coloration indicated by Loew is like that 
of the species just described. In the present specimen the differ- 
ence between the yellowish anterior portion of the wing and the 
smoky posterior portion is but weakly indicated; the dark shade 
appears to begin behind the third vein, instead of in front of it, 
thus leaving a pale streak along the anterior margin of the first 
posterior cell. No trace of the distal extension of the dark shade 
to the costa at the tip of the second vein, as indicated by Loew, is 
perceptible, nor is there any strong contrast in the coloration of 
the veins in the two regions. Another difference occurs in the 
coloration of the abdomen; this may, however, be due largely to 
the condition of the specimens, since the insect is said to have an 
entirely pale abdomen in life. In Loew’s specimen the abdominal 
segments are said to have basal dark bands, while in the specimen 
before me these bands are apical. It is possible that the Florida 
specimen represents a distinct species, but the variability shown 
by the three specimens of 7. albifrons, and the paucity of material, 
indicate a conservative course. 
PROTHETELY IN THE LARVA OF PHOTURIS PENNSYI- 
V.ANICA DE GEER. 
By Francis X. WILuiAms, 
Bussey Institution, Harvard University. 
The term prothetely (tpo@ety, to run before, and 7réXos, 
completion) was proposed by Kolbe in 1903, who applied it to 
that condition found in insect larve in which the imaginal discs 
have developed with abnormal rapidity resulting in the production 
of larvee with pupal or imaginal characters. 
Prothetely, though not of common occurrence, has been noted 
chiefly in coleopterous larvee, being there represented by external 
wing-pads, adult legs, additional antennal joints, modified mouth- 
parts, abdominal tergites, etc., one or several of these peculiarities 
occurring in a single larva. 
