48 
PSYCHE 
[April 
“Maxillae inserted between the mandibles, near the labium; cardo extremely 
short, fixed; stipes flattened cylindrical, directed anteriorly. The slender two- 
jointed exterior lobe (galea) of the maxillae is inserted on the maxillary stipes> 
and is motile. Interior lobe (lacinia) rudimentary or wanting. Genae without 
maxillary scrobes. Maxillary palpi filiform, three-jointed, sparsely furnished 
with setae, and borne on a short conical palpigerous stipes (squama). 
“The mentum is small, usually transverse, trapezoidal. The stipites of the 
labial palpi are concrete; taken unitedly, quadrate-clavate. Labial palpi two 
jointed, often sparsely setose. The ligula generally bears two setae. 
“Thorax of three segments, of which the prothorax is longest; each seg- 
ment, except in rare cases, provided with dorsal scutes. 
“ Dorsal scutes of thorax concrete at median line, those of the prothorax 
entire and concealing the sides. 
“Praeterga of thorax usually evident, often strigose; praetergum of prothorax 
the longest. 
“Postterga of thorax usually evident, often strigose. 
“Sternal scutes of prothorax evident, usually concrete at median line; those 
of the mesothorax and metathorax minute or wanting. 
“Legs six-jointed; consisting of coxa, trochanter, femur, tibia, tarsus, claw 
(usually double); of moderate length, showing in dorsal view of the larva, when 
they are e.xtended, at least part of the tibiae and the tarsi and claws. 
“Coxae conical, exserted, in length less than four times the thickness of their 
base; with a (sometimes short inconspicuous) femoral scrobe; increasing in 
length from fore to hind pair. 
“Trochanters clavate, usually shorter than the coxae, and bearing ambulatori- 
al setae. 
“P'emora clavate, setose, and usually shorter than the coxae. 
“Tibiae more or less clavate, more than one-third as long as the femora. 
“Tarsi exserted, movable, usually conical-cylindrical; equaling the coxae in 
length, or shorter; usually longer than the tibiae. 
“Claws usually two on each foot. Kmpodia generally of two very short setae. 
“.Abdomen straight, more or less depressed, cursorial or ambulatorial, longer 
than the thorax, and with the dorsum unarmed. Ninth abdominal segment 
exserted. 
“ Dorsal scutes, when present, on the abdomen, concrete at median line, and 
with praeterga and postterga. 
“Dorsal scute of the ninth abdominal segment usually present. 
“Lateral scutes of the abdomen often defective; when present, exserted, 
oblong, convex. 
