USED IN ENTOMOLOGY. 105 



Post antennal organs: in Collembola, oblong or ellipsoidal organs situated 



just caudad of the bases of the antennae. 

 Post-brachial: = pobrachial : q. v. 

 Post-cerebral: applied to that pair of salivary glands in bees, situated close 



to the posterior wall of the head. 

 Post-clypeus : in Odonata, the upper of the two parts into which the clypeus 



is divided: in Psocidtf, a peculiar inflated structure behind the clypeus: in 



general, the posterior or upper part of clypeus when any line of demarcation 



exists : = supra-clypeus ; nasus : afternose : paraclypeus ; first clypeus ; clypeus 



posterior. 

 Post-costa: = sub-costa (Comst.) : in Odonata, = 1st anal vein (Comst.) : in 



Trichoptera = anal. 

 Post-costal space: Odonata; the cell or cells lying posterior to the post-costa; 



== anal cell (Comst.). 

 Post-cubitals: = post-nodal spaces; q. v. 

 Post-dorsulum: the middle piece of the meta-notum, between the meso- 



phragma and post-scutellum. 

 Post-embryonic -otic: the stage after the insect has come out of the egg. 

 Post-epistoma: that part of the head behind the clypeus in Hymenoptera : 



see also post-clypeus. 

 Posterior: hinder or hindmost; opposed to anterior: in Diptcra ; applied to 



that face of the legs which is not visible when viewed from the front, the 



legs being laterally extended. 

 Posterior angle: of thorax, in Coleoptera, is the lateral angle near base of 



elytra : of the wings = hind angle ; anal angle ; q. v. 

 Posterior cells: in Diptera .(Will.) : 1st = radial 5 (Comst.): 2d = medial 1 



(Comst.): 3d = 2d medial 2 (Comst.): 4th = medial 3 (Comst.): 5th = 



cubitus 1 (Comst.). 

 Posterior cephalic foramen: in Odonata, the opening of head posteriorly 



through which the cavities of head and thorax communicate. 

 Posterior field: of tegmina, = anal field; q. v. 



Posterior intercalary: in Diptera, is one of the anal veins (Comst.). 

 Posterior lateral margins: in Orthoptera, extend from base of pronotum 



downward to the posterior angle of sides. 

 Posterior lobe: of the pronotum in Orthoptera, see lobe: in Diptera. that 



part of wing between axillary incision and base: =: alar appendage (Loew). 

 Posterior margin: = inner margin; q. v. 

 Posterior pereion: the meta-notum. 



Posterior pleon: the terminal segments of the abdomen. 

 Posterior pleopoda: the anal clasping legs of caterpillars: see planta. 

 Posterior stigmatal tubercle: on thoracic and abdominal segments of cater- 

 pillars; varies in position from substigmatal to stigmatal posterior; some- 

 times united to V : it is IV of the abdomen, II of the thorax (Dyar). 

 Posterior trapezoidal tubercle: on the thoracic and abdominal segments of 



caterpillars; subdorsal, posterior, always present, rarely united with I: it 



is II of the abdomen, lb of the thorax (Dyar). 

 Posterior veins: those separating the posterior cells. 



