EXTERNAL ANATOMY OF INSECTS. 563 
the Heteropterous Hemiptera the anterior part of the 
scapular is covered by the anfepectus, and separated by 
a ridge, more or less pronounced, from the open part ; 
the whole is of an irregular shape, and nearly parallel 
with the parapleura. In the Homopterous section it 
likewise consists of two pieces, and sometimes of more. 
Thus in Cicada it is bilobed, and between it and the 
coxa two small pieces are inserted’. In some others, 
Lassus, Lanio, &c., it is not very unlike the scapular in 
Coleoptera, being subquadrangular and divided diago- 
nally. In the Neuroptera this part and the parapleura 
are parallel, and placed obliquely®. In the common 
dragon-fly (shna viatica) the former forms nearly a 
parallelogram‘, which is not divided by any ridge or 
channel, but its lower half is separated into two unequal 
parts by a black longitudinal line, opposed to which on 
the inside is a ridge. The mid-leg in these is connected 
with the scapular by the intervention of a triangular 
transverse anterior piece, which in fact seems only 
marked by a black channel, to which also interiorly a 
ridge is opposed‘, In the rest of the Order it is divided 
longitudinally into ¢wo parallel pieces. In Panorpa the 
posterior piece is longer than the anterior and props the 
coxa behind; in Myrmeleon and Perla, &c., it appears 
to consist of three pieces. I have not been able to ob- 
tain a clear idea of them in the Lepidoptera, except that 
they have more than one piece. Hymenopterous and 
Dipterous insects for the most part have no scapular di- 
stinet from the peristethium ; but in Cimbex, Perga, and 
other saw-flies, it seems represented by its posterior de- 
* Prate VIII. Fie, 17. 0’. » PrateE IX. Fic. 8. 0. 2’. 
* Thid. o’. @ Tbid. a. 
202 
