EXTERNAL ANATOMY OF INSECTS. 565 



are usually divided into two parallel pieces, corresponding 

 probably, though more distinct, with the two parts late- 

 ly noticed of those of the Coleoptera: the upper side of 

 the socket of the mid-leg is common to the base of both 

 these pieces, but the articulation of the tegmen is chiefly 

 with the anterior one. In the grasshoppers, locusts, &c. 

 (Grylhis L.) in which tribe this leg is nearly opposite to 

 that part, the scapular inclines but little from a vertical 

 position 3 ; but in the praying- insects (Mpntis), spectres 

 (Phasma), and cockroaches (Blatta), in which the in- 

 sertion of the mid-legs is behind that of the tegmina, it is 

 nearly horizontal. In the Heteropterous Hemiptera the 

 anterior part of the scapular is covered by the antepectus, 

 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 -para-pleura. In the Homopterous 

 section it likewise consists of two pieces, and sometimes 

 of more. Thus in Tettigonia F. it is bilobed, and be- 

 tween it and the coxa two small pieces are inserted b . In 

 some others, lassus Lanio F., &c, it is not very unlike 

 the scapular in Coleoptera, being subquadrangular and 

 divided diagonally. In the Neuroptera this part and the 

 parapleura are parallel, and placed obliquely c . In the 

 common dragon-fly (JEshna viatica) the former forms 

 nearly a parallelogram d , 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 



a Plate VIII. Fig. 12. 13. o. z'. b Ibid. Fig. 17- o. 

 u Plate IX. Fig. 8. o. z. ,l Ibid. o. 



