﻿PROCEEDINGS OF THE UNITED STATES NATIONAL MUSEUM 



issued 



SMITHSONIAN INSTITUTION 

 U. S. NATIONAL MUSEUM 



Vol.100 Washington: 1949 No. 3257 



TWO NEW GYNANDROMORPHS, WITH A LIST OF PREVI- 

 OUSLY RECORDED SEXUAL ABERRATIONS IN THE 

 SCOLIOID WASPS 



By Karl V. Krombein 



True gynandromorphs are extremely rare natural freaks among 

 insects, and less than a dozen have been recorded to date in the Scoli- 

 oidea. These wasps usually exhibit striking sexual dimorphism, so 

 that any aberrancy is ordinarily readily detected because the gynan- 

 dromorphs present a very bizarre appearance. 



A short time ago, while examining a lot of Scolioidea submitted for 

 identification by Prof. T. H. Hubbell, curator of insects, Museum of 

 Zoology, University of Michigan, I was delighted to find two lateral 

 gynandromorphs belonging to the families Tiphiidae and Scoliidae. 

 The tiphiid is a specimen of Myzine maculata (Fabricius) from Flor- 

 ida in which the head and abdomen are completely male, while the 

 thorax is divided, the left half being entirely female and the right 

 half entirely male. The scoliid is a specimen of C ampHOTtieris ephip- 

 pium. ephippium (Say) from Mexico and is a complete lateral gyn- 

 andromorph, the entire left side being male and the right side female. 

 Dr. Hubbell has very kindly permitted me to retain both specimens for 

 the collection of the United States National Museum. Descriptive 

 notes and photographs of the two specimens are presented herein. 



MYZINE MACULATA (Fabricius) 



Plate 1, Figxibes 1-3 



Tiphia maculata Fabricius, Entomologia systematica . . ., p. 224, 1793. Female. 



As stated above, the entire head and abdomen are completely male 

 and differ in no respect from normal males collected in the same 



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