420 



N. E. McINDOO 



The chitin in sections usually did not take the stain, but re- 

 mained a naturally dark color; however, in the labrum and at the 

 tips of the labial palpi the outer stratum and pore walls are dark 

 yellow (represented by black in figs. 75 and 89), while the re- 



65 / H ■_ sttl 14 



EsJJ il 



ii 



oMi 74 



pin 



76 72 





Sfpe •■»„ o 0-0,0 



56 55 59 



54 



Figs. 67 to 89 Sections showing internal anatomy of olfactory pores of adult 

 grasshoppers (Melanoplus femur-rubrum), soon after having molted the last 

 time. Fig. 67, pore from mandible; fig. 68, pore from maxillary palpus; fig. 69, 

 pore and sense cell from galea; fig. 70, pore from lacinia; fig. 71, pore from hypo- 

 pharynx; fig. 72, pore from labial palpus; fig. 73, pore from ligula; fig. 74, pore 

 from mentum; fig. 75, 3 pores from labrum; fig. 76, pore from head capside; fig. 



77, pore and sense cell from two sections through second antennal segment; fig. 



78, pore from abdominal segment; fig. 79, pore from ovipositor; fig. 80, 5 pores 

 and 3 sense cells from four consecutive sections through trochanter; fig. 81, 2 

 pores from femur; fig. 82, pore in group from tibia; fig. 83, isolated pore from tibia; 

 fitr. M, pore :iik1 sense cell from Imse of pseudo-spine on tibia; fig. 85, pore from 

 daw; fig. 86, pore from pulvillus; fig. 87, pore in group from front wing; fig. 88, 

 isolated pore from hind wing, and fig. SO, gland pore and gland cell (CllC) from 

 labrum. A />, pore aperture; Can, pore canal; Con, chitinous cone; Hyp, hypo- 

 dermis; /. indental ion encircling chitinous cone; SC, sense cell, and W, pore wall. 

 X500. 



