546 



JOURNAL OF ECONOMIC ENTOMOLOGY 



[Vol. 10 



and hop heads, but serious injury to these parts could not be detected. 

 Pole yards are attacked worse than string yards; in string yards, the 

 vines on the pole show more injury than those on the strings. The 

 work of the hop redbug is similar to that described by F. V. Theobald 

 for a related species, Calocoris fulvomaculatus Deg., which has caused 

 some injury to the hop in England. 



Life-History 



Egg — The egg (Fig. 2S) is 1.6 mm. long, .4 mm. wide and .2 mm. thick; dirty 

 white, curved, with two prominent, pure white, incurving hooks on the micropyle end. 



One hook is pointed and the other is 

 blunt at the tip. The surface of the egg 

 is smooth and glossy. 



Fig. 28. Paracalocoris hawleyi: lower 

 figure, eggs in bark, X 9; upper figure, 

 one egg, more enlarged (original). 



The eggs are inserted singly and 

 in groups of two, three or four in 

 the bark or wood of hop poles, to 

 which they are attached by a 

 secretion. In cedar bark the eggs 

 are placed in a slit in the bark 

 transverse to the grain, and can 

 best be seen by tearing the bark 

 lengthwise (Fig. 28). When found 

 in this way, the otherwise incon- 

 spicuous white cap may be located 

 on the outside. Only one egg has 

 been found in the hard wood of a 

 pole. This was in a crack just 

 deep enough for the egg. Since nymphs are equally common in the 

 spring on poles of this kind, eggs must be laid there in large num- 

 bers. The egg stage lasts from nine to nine and one half months. 



Nymph. — Stage I: Length, 1.3 mm. (average of 10); general color light tomato red; 

 a median, variable light line runs from near the cephalic end of the head to near the 

 posterior end of the second abdominal segment, faint in some but in others distinctly 

 white, bordered laterally on the thorax by clay colored patches. Antenna3 with the 

 basal segment slightly clubbed, tomato red and sparsely clothed with hairs, second 

 segment sparsely hairy, white (^/s) and red (^/b), third segment sparsely hairy, white 

 {\) and red {\), fourth segment densely hairy, clay color with small white spot at 

 base. Coxa of leg is white, trochanter white, femur red, tibia with three red and three 

 white bands of varying breadth, tarsus white with dark tip, claws dark. Each 

 abdominal segment bears a row of dark setae; head and thorax bear irregularly ar- 

 ranged seta;. Beak is white with dark tip. Venter is clay color. In a few cases the 

 median line is wanting as well as all white bands, the in.sect being red with the excep- 

 tion of 4th antennal segments. The description is for the most typical specimens 

 (Fig. 29). 



Stage II: Length, 1.9 mm. General color, slightly darker; median line broader and 

 more distinct; clay colored border patches indistinct; bands on antenna) and legs 



