566 



INSECTA. 



habitat in the abdomen of wasps and humble bees (Bombyliidce) front 

 which they only protrude the anterior part of their body. In copu- 

 lation the males are said to open by means of their copulatory 

 organ the dorsal tube of the female, which is at first closed. The 

 ovaries have 110 oviduct, and continue as it seems at an earlier stage 

 of development, since they probably like those of the viviparous 

 Cecidomyia larva? produce eggs. The eggs fall freely into the body 

 cavity, are fertilized and develop (perhaps sometimes parthenogene- 

 tically) into larvae, which pass out through the above-mentioned 

 dorsal canal and become attached to larva? of bees and wasps (fig. 470). 

 In this larval state they are able to move about and possess, like the 

 young larvae of Cantheridce, three well-developed pairs of legs, and 

 two caudal seta? on the abdomen. They bore their way into the 



body of their new host. About 

 eight days later they undergo 

 an ecdysis, and change to 

 an apodal cylindrical maggot, 

 which becomes a pupa within 

 the Hymenopteran pupa, and 

 as such bores its way out with 

 its head from the abdomen of 

 the latter. The males leave 

 the pupal skin and seek the 

 females. They seem to live 

 only a short time. 



Fam. Stylopidae. AVo.< Russli 

 Kirb. (A", ratparum- Ross.) parasitic 

 in Polisti'S ytiUira. Sti/lops /iicJitfce 

 Kirb. 



FIG. 470. Sti/lojits( 'hihlreni (after Kirby). a, Larva. 

 I, Female, c, Male. 



Order 



5.- 



-Rhynchota* = Hemiptera. 



Insects with jointed rostrum, piercing (exceptionally biting} mouth 

 parts. With usually free prothorax and incomplete metamorphosis. 



The mouth parts are almost without exception arranged for 

 taking up fluid nourishment, and are usually represented by a 

 rostrum, in which the mandibles and maxilla?, as four rigid styles, 

 are moved backwards and forwards. The rostrum, which is formed 



* Burmeister, " Handbuch cler Entomologie." II. Bd., Berlin 1835. 



J. Halm, "Die wanzenartigen Insecten." Niirnberg, 1831-1849. Continued 

 by H. Schiiffer. 



F. X. Fieber."Die europaischen Hemipteren nach der analytischen Methode." 

 Wien, I860. 



