NEUROPTERA. 
337 
Eaphidia. (PI. LIV, fig. 12.) Praescutum present, but obscurely 
marked, being almost obsolete, but the outline is seen to be triangular. 
The scutum is large, only half divided by the scutellum, which is much 
shorter than broad, but triangular in form. Postscutellum forms a nar- 
row, transverse baud, which is shorter than in the mesonotum. 
Pleurum. 
Corydalus. In the propleurum (PI. LXIV, fig. 1) the episternum and 
epimerum are minute, rudimentary, and not well defined; owing to the 
great size of the steruite no trochautine is visible. The coxa is large 
and thick, about twice as large as the succeeding coxae. 
Eaphidia. (PI. LIV, fig. 13). Much as in Corydalus; the episternum 
and epimerum are minute aud rudimentary, the relative form of these 
sclerites not being easily made out. The coxae, however, are long and 
thick, and much larger than those of the meso- aud metathorax. 
In Corydalus (Fig. 2) the meso-tlanks are rather short and thick ; the 
suprasternite square. The episternum is a little longer than broad; 
the suture between it and the steruite is obsolete. The epimerum is 
moderately long, widening considerably towards the insertion of the 
wings. The coxa is very short and thick. The trochautine is very 
small ; one-half as large as the coxa. 
Eaphidia. (PI. LIV, fig. 14.) The mesopleurites are just as in Cory- 
dalus, but longer and slenderer, and the suture of the sternum is well 
marked. The epimerum is longer aud narrower above than in Cory- 
dalus, and the trochautine is small; coxa moderately large. 
Metapleurum ( Corydalus ). (Fig. 12.) The Hanks of the metathorax 
are longer, i. e., thicker, than in the mesothorax ; being also shorter 
vertically. The episternites are shorter vertically, but thicker, and the 
coxae are shorter aud thicker. The epimerum is undivided, not so wide 
above (next to the insertion of the wings) as in the mesothorax. The 
trochautine is a little smaller than in the mesothorax. 
Eaphidia. (PI. LIV, fig. 15.) As in Corydalus, the metapleurites are 
decidedly thicker and longer than the pleurites of the mesothorax. The 
episterna are both larger aud thicker than in the mesothorax. The epi- 
merum is not divided, narrower below, aud wider towards the insertion 
of the wing than in the mesothorax. The coxa is nearly twice as large 
as in the mesothorax. 
Sternum. 
Corydalus. The prosternum (Fig. 4) is remarkably large, square, with 
au anterior, short, separate piece, or prsesternite. 
The mesosternum (Fig. 5) is large and very broad, transversely sub- 
oblong, the suture between it and the infra-sternite only partial. 
The metasternum is as in the mesothorax, but a little larger (Fig. 6). 
Eaphidia. The prosternum (PI. LIV, fig. 10) is very large, long, and 
narrow oblong autero-posteriorly, aud is covered by the bent-down 
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