10 OHIO STATE ACADEMY OF SCIENCE. 
In order to study certain parts closely and locate their boun- 
daries it is necessary to remove the vestiture which is most abund- 
ant on the face and sides of the thorax. 
Head of female. The anterior part of the head is largely 
occupied by the compound eyes which are brown in color, and 
each 1s crossed transversely by two narrow, slightly curved, green- 
ish or purplish bands. 
The antennae are located on the lower middle of the head, 
and each is composed of three segments of which the third bears 
near its base an angular prominence which may be called the 
upper angle or basal prominence ‘of the third antennal segment. 
Also this segment is compound, being composed of five annula- 
tions of which the basal one is longer than the other four taken 
together. 
The front or frons, which is the region between the eyes 
above the antennz is nearly of the same width throughout. The 
space just above the antennz, the subcallus, is pollinose in this 
species. Above the subcallus is the frontal callosity, which is 
naked and shining, and occupies nearly the whole width of the 
lower part of the front. It is quadrangular in form, with a nar- 
row elongate extension upward from its superior side. 
The upper part of the front is the vertex, and the limit of 
the front above is the vertical margin. The face occupies the 
space bounded by the antennz, eyes and oral margin. 
The middle part of the face beneath the antennz is swollen, 
while on each side is a less elevated area known as the cheek. 
The lower part of the face passes to the oral margin and the 
proboscis. The part of the proboscis which is visible in nature 
is largely labium. 
The labium is grooved on the upper side, and into this groove 
the other mouth parts, with the exception of the palpi, are re- 
ceived. It may be likened to a sheath for the edges of the groove 
are extended and meet above, for at least a part of the length. 
Its distal part is furnished with an enlargement, the Jabella, which 
when the insect is taking food becomes a sucking disk. 
Thé mouth parts which are received into the groove of the 
labium consist of six stylets, which are light brown in color and 
otherwise resemble one another. If these be separated from the 
labium, the Jabrum may be seen farthest forward and just behind it 
the smaller hypopharynx. Next in order passing backwards are 
the mandibles lying side by side while the marillae the narrow- 
est of the mouth parts lie posterior to the mandibles. Each 
maxilla has attached to its base a large maxillary palp, which is 
composed of a shorter basal, and a larger and longer distal joint. 
These maxillary palps in their natural position are very promi- 
