Protocerebrum of Micropteryx. 129 





-su.^t 



'(K<j( 



Text figuke 3. — Outline drawing of six longitudinal vertical 

 sections (A-F), to show the relations of the parts of the mushroom 

 body to surrounding pc. L, the last being nearest the middle line. 

 The six sections are not consecutive. Dorsal is to the left ; anterior 

 (cephalad) towards the top of the page. Only the axonic parts are 

 here shown, the cells being omitted. 



a. etc. nerve fibres of tract a (p. 136) and other tracts, passing 

 from protocerebrum to lower parts of brain, as. br. ascending 

 branch, as. tr. ascending trunk. h. tract b. br. bridge. d. I. 

 dorsal lobe. ei. Einstromraung (ji. 120). hd. head of mushroom 

 body. in. ca. inner capsule of central body. in. r. imier root of 

 mushroom body. oc. gl. ocellary glomerulus, oc. n. ocellary nerve. 

 ou. ca. outer capsule, pc. I. protoccrcbral lobes, po. br. posterior 

 branch, st. stem. sw. hd. swollen head of mushroom body. sic. si. 

 swollen foot of stem. vl. I. ventrolateral lobes. 



TRANS. ENT. SOC. LOND. 1917. — PART I. (NOV.) K 



