﻿TWO NEW GYNANDROMORPHS — KROMBEIN 57 



opaque, strongly sclerotized, and densely haired, while in the female 

 this sclerite is entirely lacking (also absent in nomial females). The 

 eighth tergite (pi. 2, fig. 9) in both sexes is retracted, transparent, 

 weakly sclerotized, but quite differently shaped, that of the male rela- 

 tively smaller and more or less triangular with a more weakly sclero- 

 tized, colorless rounded lobe at apex in middle, while that of the female 

 is larger, subquadrate in shape, and almost divided in half at the mid- 

 line. The eighth sternite in normal males is retracted but opaque and 

 strongly sclerotized, ending in three long, slender spines which pro- 

 trude from the apex of the abdomen. In the gynandromorph the 

 eighth sternite (pi. 2, fig. 10) is present only on the male side (this 

 sclerite lacking in normal females) ; the lateral spine is normal, but the 

 median spine is shorter than in normal males and slightly curved 

 upward instead of being straight. 



The genitalia (pi. 2, figs. 11, 12) are symmetrically divided, the 

 entire left half male and complete in every detail, the right half 

 female. The only difference from the normal male genitalia that can 

 be noted is that the gonobase (cardo) is shorter than in normal males. 

 The female half is much smaller than in normal females. The valvi- 

 fers and sting palpus are normal in shape, but the valvulae are aber- 

 rant, the first valvula being aborted and straight rather than being 

 curved strongly upward near the base to lie adjacent to the second 

 valvifer, while the second valvula is separated from the first, also 

 aborted, flat, and broader than normal. The apices of the valvulae 

 may have been broken off during processing, as there was a great mass 

 of material in the genital chamber (probably the meconium) which 

 had to be cleaned away before the structures could be studied. 



The homologies between the parts of the male and female genitalia 

 suggested by Michener (Bull. Amer. Mus. Nat. Hist., vol. 82, pp. 

 191-193, 1944) seem to be borne out by the genitalia of this gynandro- 

 morph. 



Label data: Cerro Tancitaro, Michoacan, Mexico; June 10, 1945 

 (Wm. H.Burt). 



ANNOTATED LIST OF RECORDED SEXUALLY ABERRANT 

 SCOLIOIDEA 



Dalla Torre and Friese (Ber. nat.-med. Ver. Innsbruck, vol. 24, pp. 

 1-96, 1 pi., 1899) presented a detailed account of all hymenopterous 

 gynandromorphs recorded through the year 1896 as well as describing 

 a few additional specimens. Enderlein (Stett. Ent. Zeit., vol. 74, pp. 

 132-140, 1913) brought the list up to date through 1913. The follow- 

 ing annotated list includes all records of Scolioidea given in the above 

 papers and brings the list up to date through the Zoological Eecord 

 for 1947. 



