86 Annals Entomological Society of America [Vol. XIV, 
In the Neuropteron shown in Fig. 86, the palpifer is adherent to 
the stipes, while in the Mecopteron shown in Fig. 85, it is less closely 
associated with the stipes, and in the Mecopteron shown in Fig. 84 
it has the appearance of a basal segment of the maxillary palpus, ‘‘mp.”’ 
I am not sure of this interpretation, however, since the structure 
interpreted as the palpifer may actually be a basal segment of the 
palpus, and on this account no label was affixed to the structure in 
question. In the beetle shown in Fig. 3, the palpifer, “pfr,’’ is much 
larger than in most Coleoptera (Figs. 1, 3, etc.); it has also developed a 
peculiar prominent palpiferal angle or projecting angle-like process in 
the region bearing the label ‘“‘pfr,’’ and through a distortion or shifting 
of the parts, the maxillary palpus, “‘mp,’’ comes to lie over the surface 
of the palpifer in a peculiar fashion. 
I had at first considered that the areas labeled ‘‘bs,’’ ‘“‘in”’ and 
“ds” in Fig. 25, for example, represent three divisions of the stipes 
(i. e., basistipes, interstipes and dististipes) and therefore affixed to these 
areas labels indicating that they are divisions of the stipes. After the 
blocks for the plates had been made, however, and it was therefore too 
late to change the labelling, a further study of the palpiferal region 
brought to light considerable evidence for considering that the sclerite 
labeled ‘‘ds”’ in Fig. 25 represents the true palpifer or palparium, and is 
therefore not a part of the stipes. The area bearing the label “‘bs”’ in 
Fig. 25, however, is apparently a proxistipes, or proximal subdivision 
of the stipes, and the area labeled ‘“‘in” is apparently a dististipes, or 
distal subdivision of the stipes. In Figs. 31, 23, 27, 22, 21, 20, 24 and 
26, on the other hand, the sclerite labeled ‘“‘bs’’ apparently represents 
the entire stipes, rather than a proximal subdivision of the stipes, as 
the label indicates, while the sclerite labeled ‘‘ds’’ in these figures 
apparently represents the true palpifer instead of a distal subdivision 
of the stipes, as the labels indicate. It thus comes about that the label 
‘“‘bs’’ indicates a basal subdivision of the stipes in Figs. 25, etc., but in 
the other figures mentioned above, the label ‘‘bs’”’ indicates the entire 
stipes, but I have been unable to change the labeling in the plates to 
indicate this fact. 
In the sawfly larve shown in Fig. 49 and 54, a narrow marginal 
region bearing the label ‘‘gg,”’ bearing the galea ‘‘ga’’ is demarked by a 
well defined suture. The area labeled “gg’’ in these figures may rep- 
resent the palpifer, since it bears the galea—as is true of the palpifer 
in Fig. 23, etc. If this be correct, the sclerite labeled ‘“pfr” in Figs. 
49 and 54, is merely a modified basal segment if the maxillary palpus, 
“mp,” instead of representing the palpifer as indicated by the label. 
Provisionally, however, I have followed the customary usage of hymen- 
opterists in referring to the sclerite labeled ‘‘pfr”’ in Figs. 49 and 54, 
as the ‘‘palpifer.’’ In the sawfly larva shown in Fig. 30, the so-called 
palpifer, ‘‘pfr,’”’ curves outward and forward to form the peculiar 
palpiferal process, while the stipes extends laterally in the stipital 
angle or process, bearing the label ‘“‘sa.’”’ There is also a small cardine 
angle, ‘‘ca,’’ in the sawfly shown in Fig. 30; and the peculiar processes 
