26 
Psyche 
[March 
original Javan species. Several earlier records of such larvae 
from Sumatra also assume they are identical with the Javan 
one. There are, however, in the Museum of Comparative 
Zoology four specimens from Java 4 and closer scrutiny shows 
the Sumatran species to be quite distinct. It is evidently 
widely distributed as our specimens are from southern 
Sumatra and Mjoberg found it in the northern part of the 
island, strangely enough in a region where we failed to dis- 
cover it although we spent some weeks in the jungle near 
Pematangsiantar. Kolbe in 1887 recorded its occurrence at 
Penang on the west coast. 
In the collection of the Museum of Comparative Zoology 
there are a number of other trilobite larvse one of which 
appears to represent a species that has never been described 
or figured and I am appending at the end of the present note 
a description of this as well as the Sumatran one together 
with the morphological characters that may be used to dis- 
tinguish the several species that are available to me. The 
species are all readily recognizable by good taxonomic char- 
acters and these may be applied to the diagnosis of other 
species as they may come to the notice of entomologists. 
The Sumatran Species 
(Plate 2 ; Text-fig. 1) 
Attaining a length of at least 37 mm. Color dark brown, 
but fading considerably in alcohol ; the tubercles on the dor- 
sal thoracic and abdominal segments shining black, the un- 
derside likewise brown, with the abdomen blackish at the 
sides and apex; the legs blackened apically. The lateral 
abdominal projections with yellowish tips, the pale color 
extending further basad on the apical segments, the last 
segment entirely pale both above and below. Thoracic 
segments rather wide and short, the mesothoracic dorsum 
almost two and one-half times as wide as long. The shining 
black tubercles or warts well developed, one on each side of 
the pronotum; a pair similarly placed on the meso- and 
the metanotum and all three segments with a pair of minute 
4 One from “Java” (Professor Roland Thaxter) and three from 
Bantar Gelbary (Bryant and Palmer). 
