HANCOCK i8i 



APPEARANCE OF THE EGGSHELLS DEMONSTRATING THAT 

 THE EMBRYO BREAKS THE SHELL LONGITUDINALLY TO 

 ESCAPE. 



On taking the empty eggs up (Paratettix) I found that the larva; in 

 escaping had burst the shell in most cases on two sides longitudinally, 

 the pointed end of the eggs being directed upwards. The eggs are laid 

 about an eighth of an inch (four millimeters) below the surface in a cluster. 

 May 7, iSgS. 



MUTILATION NOT INHERITED IN THE OFFSPRING OF TET- 

 TIX ORNATUS — EIGHTEEN DAYS' INCUBATION. 

 Seven Tettix eggs which I had put back in vivarium after examination, 

 hatched while I was looking in the jar at noon to-day. The eggs were laid 

 at 3 p. m. June 6, or eighteen days ago, by a long-wing specimen of ornatus. 

 The Tettix had but one hind femur, the other having been lost by 

 accident. All the larva; were normal, showing the mutilation had no effect 

 upon the offspring. 



DEFORMITY OF THE TIBI/E IN TETTIGIDEA NEWLY BORN— 

 THE CLAWS ALSO ABSENT ON THE POSTERIOR TARSI. 



A remarkable deformity occurred in a newly hatched Tetti^idea par- 

 vipennis specimen. Since hatching the individual had never disconnected 

 the two hind tibiae which were fused together. I found on examination that 

 they were joined throughout their length, and the tarsi had no claws. On 

 separating the tibia; the specimen shortly after died. June 24, 1898. 



TETTIGIDS TAKEN FOR VIVARIUM EXPERIMENTS — SALA- 

 CIOUS HABITS OF TETTIGIDEA — SEXES REMAIN LONG 

 TOGETHER — IN TETTIX A SHORT PERIOD AT A TIME. 



In a marshy meadow (south of Chicago) eleven specimens of Tettigids 

 were taken for vivarium experiments, and virgin earth taken for covering 

 the bottom of the jars. A male and female Tettigidea parvipennis, one 

 female Tettix granulatus, and Tettix oniatus and triangularis made up 

 the species. I placed them free in one jar. The male and female 

 parvipennis coupled almost immediately, and remained together the next 

 day. In coupling Tettix, sexes do not remain long together; on an average 

 ten or fifteen minutes suffices. June 3, 1898. 



On June 4 Tettigidea parvipennis r&ma\nt6. sixteen hours together in 

 copulation. 



TETTIX GRANULATUS IN CONJUGATION. 

 A pair of Tettix granulatus were in copulation last night, and this 

 morning they were still together. June 4, 1898. 



POLYANDRY IN TETTIX ORNATUS. 



A male Tettix ornatus in vivarium has effected coitus with three 

 females. June 4, 1898. 



