56 



BULLETIN (36, UNITED STATES NATIONAL MUSEUM. 



immense reduction of the prothorax in Anthericomma barberi shows 

 how far specialization has gone within the order itself. 



ACROSCHISMUS HUNTERI Pierce. 



Triimgulinids of tins species were found in a parent collected at 

 Victoria, Texas, June 26, 1906, by C. R. Jones. An adult male in 

 its puparium was found September 25, 1906, by J. C. Crawford. 



XENOS VESPARUM, Authors. 



Nassonow (1893) writes that he found triungulinids in the nests 

 of Polistes gallica at Cairo, Egypt, in the middle of March. Saunders 

 (1852) took a female wasp with three prolific female parasites about 

 the middle of July. The same author found that the triungulinids 

 "are enabled to leap to the distance of full half an inch, but by what 

 means this movement was effected" he could not determine. They 

 refused to attack either ovum with inactive embryo or ovum with 

 larvae attempting to escape, but very readily attached themselves to 

 larvae of moderate dimensions, affixing both head and tail like leeches. 

 Experiments with three triungulinids fixed the limit of the hexapod 

 stage. 



Date. 



Larva 1. 



Larva 2. 



Larva ,i. 



July 18, 2 p. in Affixed 



July 18, 3p.m 



July 18, 5 p. m Completely buried 



July 19, a. m Completely out of sight. 



July 19, p. m 



July 24 Hexapod still 



Affixed. 



Completely buried. 



Out of sight 



Hexapod still 



Placed on host. 

 Half buried. 

 Completely out of sight. 



Had just molted— apodous. 



Thus the hexapod stage parasitic is approximately six days. 

 When in the host the males have the ventral side turned away 

 from the body of the host. 



EUPATHOCERA LUGUBRIS Pierce. 



A male was bred by Mr. Dury at Cincinnati, Ohio, from Sphex 

 extrernitatus on August 30, 1905. On September 3, 1905, tins species 

 or a close congeneric species was bred by him from Sphex fragilis at 

 1 p. m. On October 2, 1901, a female wasp was taken with an 

 empty puparium. 



OPHTHALMOCHLUS DURYI Pierce. 



Mr. Dury bred males of this species from Priononyx atrata, at 

 Cincinnati, Ohio, on August 16 and 19, 1901. In the latter case 

 the host had been dead three days. As late as September 21, 1901, 

 he took a wasp with a male pupa. A female parasite was taken on 

 June 17, 1900, and on September 21, 1901, a female with triungu- 



