FIELD BOOK OF INSECTS. 



characters is the shape and arrangement of the black dots 

 on the two basal joints of their antennas. However, as is 

 the case with other groups of Orthoptera, each species has 

 a tune of its own (the tempo depending on whether it is 

 night or day, sunshiny or cloudy, warm or cold). Some 

 students have become so expert in Orthopteran music 

 that they have detected new species by ear even though 

 careful study was needed to corroborate their opinions as 

 to the taxonomic distinctness by discovering other char- 

 acters. In this genus, the male (Plate XIX) seems to 

 have gone largely to music he has broad front wings but 

 a relatively small body. The female, whose wings are 

 wrapped closely to her body, lays her eggs in such stems 

 as those of the raspberry. 



Xabea, a related genus, has no spines on the hind 

 tibiae; first joint of antennas with a blunt tooth. In 

 bipunctata the hind wings are nearly twice as long as the 

 tegmina; the creature is pinkish, the female having two 

 black spots on each tegmen (front wing). Anaxipha has 

 the second tarsal joint distinct, flattened vertically, and 

 heart-shaped; exigua is less than .3 in. long. 



ISOPTERA 



The White Ants are not ants at all but more closely 

 related to the other insects shown on Plate XXI or to 

 roaches. Their greatest development is in the tropics. 

 Our principal species (others occur in the South and West) 

 is Termes flavipes. It nests in or under old logs and 

 stumps, more rarely in the decaying wood of houses. Both 

 males and fertile females (queens) have wings which they 

 shed after their marriage flight. The males soon die but 

 the queens live on and become swollen egg-layers. A 

 large part of the offspring are sterile, wingless females, of 

 which there^are two kinds: ordinary workers and soldiers. 



CORRODENTIA 



There are two families: ATROPID.E, in which the adults 

 have no ocelli and the wings are absent or, at most, a single 

 pair of small ones present; and PSOCID^:, in which ocelli 



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