APOCALYPSIS. 83- 



body a deeper orange. Mh instar. Similar to the final instar 

 except in size. 



5th instar. Head semi-elliptical in shape, vertex very broad 

 and flattened ; true clypeus one-half length of head, no false 

 clypeus, ligula kidney-shaped. Surface of head, body, horn 

 and tubercles smooth and shining, the head set with small 

 tubercles, a larger subdorsal tubercle on the front of the 

 vertex of each lobe, another large tubercle below that. Body 

 nearly cylindrical. Horn long, very thin, bifid, rising verti- 

 cally from a large cone, and bending backwards and slightly 

 downward ; the truncated anal flap and the claspers very 

 big and heavy. A transverse row of five large rounded tubercles 

 near the front margin of segment 2, and two tubercles and three 

 spines in a transverse row farther back on the same segment ; 

 on the front margin of 3 a pair of subdorsal spines placed 

 transversely, behind them a longer subdorsal pair, and behind 

 these again a still longer pair, with a pair of long double- 

 pointed spines below them, and three small spines near base 

 of leg ; on the front margin of 4 a transverse row of four 

 spines, at about the middle of the segment a transverse row 

 of three long double-pointed spines, and on the hind margin 

 a row of small spines, and a pair of short spines near base 

 of leg ; 5 has a long subdorsal spine behind the front margin 

 with a second shorter one behind it, a pair of short spines 

 with their bases confluent in front of the spiracle, and a group 

 of five or six small ones below it ; there is also a long sub- 

 spiracular spine ; 6 has an extra pair of short spines placed 

 subdorsally in addition to spines as on 5 ; 7 to 11 have spines 

 as on 5. The thin, slightly tapering, bifid horn rises from 

 a large cone on 12, and this segment has a long spine below 

 and behind the base of the horn, another long subdorsal spine 

 behind it and a pair of long spines below this ; there is also 

 a long spine in front of the spiracle and a pair with confluent 

 bases below and behind it. The uppermost tubercle or spine 

 of each of the transversely-placed pairs, or of each transverse 

 row mentioned above, is subdorsal, and there are, of course, 

 an equal number of tubercles and spines on the other side 

 of the dorsal line ; the spines are thick at the base, which 

 is longitudinally oval in section, and taper sharply to a point, 

 the whole spine bending slightly backward. Anal flap 

 truncate and tumid, with a large pointed tubercle at each 

 lateral angle and a longitudinally-placed pair nearer the base ; 

 several similar tubercles on clasper-faces. 



Coloration. — Head yellowish-green with a broad pale stripe 

 running from the vertex of each lobe to base of antenna. 

 Body canary-yellow, with a green tinge on segment 2, the 

 anal flap, claspers and venter ; the tubercles and spines 

 on 2 to 12 white or blue with white tips ; those in the dorsal 



g2 



