Explanation of Plate IV. 
Variation of Normal Marking. 
Figs. 39-41. Normal of PQ 4 subtype, showing fluctuation. 
Fig. 42. A normal of PQ 3 subtype or moderate intensity. 
Fig- 43- A PQ a normal. 
Fig. 44. A PQ 1 normal. 
Fig. 45. A plain. 
Figs. 46-49. Variation of the "eye-spots" or "eyebrows". 
Fig. 46 (a, b). PQ 4 normal. 
Fig. 47 (a, b). PQ 3 normal. 
Fig. 48 (a-c). PQ 2 normal. 
Fig. 49 (a-d). PQ 1 normal, d representing a "specious" plain. 
Fig. 50 (a-g). Variation of normal pattern in the third larval stage, 
the pattern pigment ranging from the darkest (a) to the 
lightest (g). 
