1895.] The Mouth-Parts of the Lepidoptera. 555 
Finally, I may call attention to another evident case of mis- 
taken identity in Burgess’s paper on the anatomy of Danais, 
-not for the sake of picking flaws in this admirable one of the 
few American contributions to the knowledge of insect mor- 
-phology, but for the sake of, if possible, preventing the confu- 
sion of the student of comparative insect morphology by his 
too willing complete acceptance of this monograph as a basis 
for his study of lepidopterous anatomy. Two minute, thorn- 
like projections, one on each lateral margin of the maxillar 
proboscis near the base, are referred to by Burgess as the rudi- 
ments of the maxillary palpi. Now the lepidopterous proboscis 
is composed of the greatly elongated terminal lobes (galez or 
laciniæ) of the maxilla, while the maxillary palpi always 
-arise from the median or sub-basal sclerite, the stipes of the 
typical maxilla (in reality often from a more or less distinct 
-sclerite, the palpiger, at the side of and closely applied to the 
stipes). We should expect, therefore, to find any palpal rem- 
nants on the fixed basal portion of the greatly modified lepidop- 
terous maxilla, that portion which does not enter into the 
composition of the proboscis, but constitutes a portion of the 
fixed floor of the head (see fig. 9, mz. b., plate XXV). Where- 
-ever the maxillary palpi or their rudiments are present among 
‘the Lepidoptera, and it is only among the highest, the most 
specialized, of the butterflies, that they can not be made out 
with certainty, these palpi or their rudiments do, in reality, 
arise from that very part on which our knowledge of the 
homologies of the insectean mouth-parts would lead us to 
expect to find them. This is well shown in the figure of the 
under side of the head of Catocala sp. (see fig. 9, mz. p., plate 
XXV). Here the short, single-segmented, scale-covered palpal 
rudiments appear on the fixed basal part of the maxille, on 
the under side of the head, and at some little distance from the 
origin of the elongated, proboscis-forming, terminal lobes of 
the maxille. 
EXPLANATION OF PLATE XXV. 
Fig. 1. Anabolia fulcata, cephalic aspect of head: g. t. genal 
tubercle; mz. l., maxillary lobe; mz. p. maxillary pal- 
