No. 487] 



A NEW SPECIES OF TELENOMUS 



427 



moreover has a marked influence on the sex of the offspring. The 

 following diagram shows the history of the offspring of a single 

 female, which was one of a lot of 120 females and 19 males bred 

 from eggs of pentatomids collected at Barstow, September 12, 

 1905: 



9 (probably fertilized) 



9 9 (females probably fertilized) 



????? 9 9 99 9 99 9^ (probably not 



, ^ , , . , , ^ , . , . fertilized) 



12j>c?,19 4d^c?,6? 206^(5^,19 3c?d^ 

 The specimens recorded in the diagram by a " V escaped or 

 were otherwise lost so that their sex is unknown. The last genera- 

 tion included eighteen specimens which are not indicated in the 

 diagram, since they came from eggs laid before the individuals 

 of the preceding generation had been separated fi-oni one another. 

 Of these eighteen, fourteen were males, and tlie others escaped 

 before their sex had been determined. Two females bred to 

 maturity in tiie laboratory imder conditions which allowed of 

 less doubt concerning their supposed infertility, oviposited in eggs 

 of Fentatoma li(/ata and produced 27 and 21 adult parasites respec- 

 tively; of these 17 and 15 respectively were males and the remain- 

 der escaped before their sex was determined. To summarize: — 

 The offspring of the probably fertile females numbered 10 females, 



1 male, and 5 undetermined; the offspring of the probal)ly infertile 

 females numbered 93 males, 2 females,' and 20 uiidetcrniitied. 



tiona/and probably the stn.iiuv>( cviM.mkv Tii;ii tlir tVrtiHtv <„• 

 infertility of the eggs of the parasite (ictcriiiinc^ to a utcat extent 

 the sex of the offspring. Sixteen females and S males were br(><! 

 from a batch of eggs of Pentatoma liqaia colNn'ted in a cotton held ai 

 Tlahualilo, in July, 1905. Another batch yielde.l 2() femalr. and 



2 males. Pentatomid eggs collected at liarstow in the months 

 of August and Sej)tember, 1905. j)f()ducc(l 125 t'cninics and I'l 

 males. In all, of aduh parasites bred from pentatomiil eiios 

 collected in the fiehl. Hi] or s5', uere femah'., and 15', umlv-^. 



