8o 



MAINE AGRICULTURAL EXPERIMENT STATION. 



I916. 



Fig. 8. Balclutha 

 (Original). 



a, b, c, d, 1st, 2nd, 3rd, 4th instars. 



The first instar is 1 mm. in length and there is no indication of wing 

 pads. The head is produced in front of the eyes; the face is dark and 

 the abdominal segments dusky with the sutures lighter, below red with 

 legs dusky. 



The second inistar is 1 1-2 to 1 6-10 mm. The general color yellow- 

 ish to light brown streaked with red ; face not dotted ; the vertical seg- 

 ment slightly produced with faint dusky patches in a medium row on 

 the ventral side of the abdomen. The head is nearly a semi-circle in 

 front of the eyes. The meso-thorax has distinct angles but is not pro- 

 duced into enlargement of wing pads ; meta-thorax with sharp hind 

 border, no pads. 



The third instar is 2 mm. or more, light yellowish near transparent 

 color, the sutures below lined with red, the wing pads partly indicated 

 and angles with the meso- and meta-thorax. 



The fourth instar is 2 3-4 to 3 mm. in length ; color light brown to 

 dusky; the wing pads developed so as to reach on to the first abdominal 

 segment. Those of the meso-thorax do not extend to the tip of the 

 under ones. 



The fifth instar is 3 1-2 mm. to 4 mm.; color differing, some speci- 

 mens being distinctly light green and others brown with red; the face 

 and body above, the legs and ventral surface with dusky patches dotted 

 with fuscous points. The wing pads reach to the 3rd abdominal segment, 

 the front ones extending as far as the hind ones. In the female, two 

 lobes and the ovipositor show distinctly and in the male, plates and geni- 

 talia. 



