520 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 55. 



scarcely visible from above, ovipositor not or but little longer than 

 first tergite. 



All of the species known are parasitic in the cocoons of Chr3^s- 

 opiclae and Hemerobiidae. 



In North America the genus is represented in addition to the geno- 

 type by (Otacustes) Ghrysopoctonus chrysopae (Ashmead), {Hemi- 

 teles) Chrysopoctonus rileyi (Ashmead), and the new species de- 

 scribed below. 



(HEMITELES) CHRYSOPOCTONUS RILEYI (Ashmead). 



{Hemiteles) Chrysopoctonus rileyi Ashmkad, Proc. U. S. Nat. Mus., vol. 12, 



1890, p. 402, male. 

 Hemiteles hemerobii Ashmead, Proc. U, S. Nat. Mus., vol. 12, 1890, p. 404, 



male.- 

 Hemiteles euryptychiae Ashmead, Ti-ans, Amer. Ent. Soc, vol. 23, 1896, 



p. 210, female. 

 Otactistes cressoniformis Viereck, Conn. State Geol. & Nat. Hist. Survey, 



Bull. 22, pt. 3, Hym. Conn., 1916, pp. 339, 340, female. 



The types of rileyi, hemerobii, and euryptychiae and a metatype of 

 cressoniformis are in the United States National Museum, and have 

 been studied in connection with other material. A series of four 

 specimens, three males and one female, reared by the writer from 

 cocoons of Ghrysopa at North East, Pennsylvania, shows the entirely 

 black thorax of the male and the partially red thorax of the female 

 and the differently colored coxae to be sexual differences. 



The exserted portion of the ovipositor is only about half as long 

 as the abdomen instead of as long as the abdomen, as stated by Vie- 

 reck. The scutellum in the female varies from all red to all black; 

 and the abdomen has the first three tergites from entirely red to more 

 than half black, the basal tergite being sometimes entirely black. 

 The darker specimens are from more northern localities. The tj^pe 

 of euryptychiae purports to have been reared from {Euryptychia 

 saligneana demons) = Eucosma scudderiana demons, but it prob- 

 ably came from the cocoon of a Chrysopa or a HemeroMus which 

 crawled into the Eucosma gall for pupation. 



CHRYSOPOCTONUS PATRUELIS, new species. 



Very closely allied to rileyi (Ashmead) and differing principally 

 as follows: 



Female. — Length, 4 mm.; antennae, 3 mm.; ovipositor, 0.8 mm. 

 Temples nearly flat; postocellar line nearly twice as long as ocello- 

 cular line ; punctuation stronger and more dense, more conspicuously 

 so on postpetiole, which in rileyi is impunctate to weakly, sparsely 

 punctate. 



Black with entire prothorax and mesopleura, except prepectus, 

 rufous (in rileyi the ventral area between the sternauli is black) ; 

 red color of abdomen confined largely to the base of the second ter- 



