THE ENTOMOLOGIST. 195 



supposed to resemble an eye-brow ; four other very small 

 spots mark the outline of a nose, and a larger bilobed spot 

 beneath them may be supposed to indicate nostrils ; this 

 parody of the human face is very familiar to school-boys, 

 most of whom are well acquainted with this common cater- 

 pillar : the general colour of the body is milky white, with a 

 tinge of blue-green ; the 2nd segment has three bright yellow 

 blotches on its anterior margin, and also a transverse series of 

 six nearly circular black spots, and a second series of eight 

 black spots near the posterior margin ; the 3rd and 4th seg- 

 ments have three yellow blotches in a transverse series, and 

 also a transverse series of eight black spots, of which those 

 nearest the middle of the back are the smallest; the following 

 segments, being the 5th to the 11th both inclusive, agree in 

 each having a transverse series of four bright yellow spots, 

 two of which are dorsal, and one on each side is lateral ; both 

 the dorsal yellow spots are bounded before and behind by a 

 black spot ; the anterior black spot is nearly circular, the 

 posterior transversely elongate ; each of the lateral yellow 

 spots is also accompanied by four black ones, the two ante- 

 rior of which range, but not very precisely, with the circular 

 black spots already mentioned, and the others with the corre- 

 sponding elongate black spots ; thus the twelve black spots 

 on the dorsal surface of each segment constitute three trape- 

 zoids, of w;hich the dorsal one is somewhat irregular, and the 

 lateral ones slill more so ; the dorsal trapezoid is in every 

 case far more conspicuous than the lateral ones; it must also 

 be noted that the anterior lower spot of each lateral trapezoid 

 includes or represents the black spiracles ; on each segment 

 below the lateral trapezoid are two circular black spots 

 placed diagonally ; at the base of each clasper is another 

 black spot: the ornamentation of the 13th segment differs 

 from the preceding ; it is divided apparently into two seg- 

 ments, of which the anterior has a transverse yellow spot 

 preceded by two round black spots and followed by a trans- 

 verse series of six rather smaller black spots ; the second 

 division consists of the anal flap, which has a medium shade 

 of yellow preceded by a direct transverse series of four 

 circular black spots, and followed by a bent series of four 

 much smaller and more approximate black spots ; the trans- 

 verse folds of skin intervening between the dorsal segments 



