PLATE I. 
An. stands for antennae. 
c.gl. 
f. 
gs. 
gt. 
gi. 
cement-glands, 
muscular fibres, 
supracesophageal ganglion, 
thoracic ganglion, 
gland of unknown nature. 
1 . 
m. 
thoracic appendages, 
mouth. 
mr. stands for retractor muscle of the thorax. 
o. ,, orifice of the sack. 
ce. , , cesophagus. 
r. ,, oesophageal ring. 
si. ,, stomach. 
t. , , testis. 
vd. ,, vas deferens. 
vs. ,, vesicula seminalis. 
Fig. 1. Male of Scalpellum regium (Wyv. Thoms.), Hoek; magnified 94 diameters. 
Fig. 2. Nervous and alimentary systems of this male ; magnified 275 diameters. 
Fig. 3. Antenna of the male ; magnified 27 5 diameters. 
Fig. 4. Transverse section of the supraoesophageal ganglion where it is in relation with 
the oesophageal ring ; magnified 275 diameters. 
Fig. 5. Transverse section of the thoracic ganglion and the thorax with its appen- 
dages ; magnified 275 diameters. 
Fig. 6. Spermatozoa and spermatozoid mother-cells; magnified 57 5 diameters. 
Fig. 7. Epithelium of the sack and muscular fibres in a young stage of development ; 
magnified 275 diameters. 
