AGRICULTURAL EXPERIMENT STATION. 



127 



Description. 



Eggs — Average length .03 id. elongate-oval, the diameter scarcely 

 one-fifth the length. ^ig. 5. 



The top squarely 

 docked and bearing 

 four rounded tubercles 

 near the center. Pale 

 whitish and translu- 

 cent when laid, but 

 becoming amber col- 

 ored with age, and 



finally the red parts of cwnch-bug, Larva, Pupa and Egg. 

 flio cinr>lr>ocirl omhr-iT/-^ vouiig larva; cl, tarsus of same: e, larva after first 

 lue euoiObea eujuxyu ;;,olt; /, larva after second molt; ^, pupa; /», leg; 

 and the eves show ^' tieak or tubular mouth; J, tarsus of mature bug. 



through. The eggs grow somewhat after being laid. See Fig. 5, 

 a and b, which shows the eggs both natural size and magnified. 



Larval stages. — The newly hatched larva (Fig. 5, c) is pale yel- 

 low, with simply an orange stain on the middle of three larger 

 abdominal joints. The form scarcely differs from that of the 

 mature bug, being but slightly more elongate ; but the tarsi have 

 but two joints (Fig. 5, d) and the head is relatively broader and 

 more rounded, while the joints of the body are subequal, the 

 prothoracic joint being but slightly longer than any of the rest. 

 The red color soon pervades the whole body, except the first two 

 abdominal joints, which remain yellowish, and the members, which 

 remain pale. After the first molt (Fig. 5, e) the red is quite bright 

 vermilion, contrasting strongly with the pale band across the mid- 

 dle of the body, the prothoracic joint [first behind the head] is 

 relatively longer, and the metathoracic joint [third behind the 

 head] shorter. The head and prothorax are dusky and coriaceous 

 and two broad marks on the mesothorax [second joint behind the 

 head], two smaller ones on the metathorax, two on the fourth and 

 fifth abdominal sutures, and one at the tip of the abdomen are 

 generally visible, but sometimes obsolete ; the third and fourth 

 joints of the antennae are dusky, but the legs are still pale. After 

 the second molt [Fig. 5,/] the head and thorax are quite dusky 

 and the abdomen duller red, but the pale transverse band is still 

 distinct ; the wing-pads become apparent, the members are more 

 dusky, there is a dark red shade on the fourth and fifth abdominal 

 joints, and ventrally a distinct circular, dusky spot covering the 

 last three joints. 



