1910] Wheeler—A Gynandromorphous Mutillid 189 
This description shows that the only particulars in which the 
left or female side departs from that of the normal female is in 
the coloration of the clypeus and the base of the third abdominal 
segment. Both of these regions are red in the normal female. At 
any rate, I find them to be of this color in some thirty specimens 
which I have examined, in twenty-eight collected by Mr. C. T. 
Brues at Woods Hole, Mass., several years ago, and in two 
taken by myself at Forest Hills, Mass., and Colebrook, Conn., 
during the past summer. In the mounted gynandromorphous 
specimen the third abdominal segment may be red at the extreme 
base, but it is drawn into the second segment so far that I am 
unable to determine its complete coloration. 
Reference to the work of Dalla Torre and Friese on gynan- 
dromorphous Hymenoptera! shows that up to 1898 only one 
gynandromorphous Mutillid had been seen, and I have been 
unable to find that any others have been described within more 
recent years. The specimen mentioned by these authors is a 
Mutilla europea L. var. obscura Nyl. which was described and 
figured by Maeklin in 1856.2, This specimen, which was taken 
at Helsingfors, Finland, was a very perfect lateral gynandro- 
morph, in which, however, the sex of the two sides was the 
reverse of that in the above described specimen of Pseudomethoca, 
being female on the right and male on the left side. Owing to 
the fact that the female Mutilla obscura has a dark head and 
the male a very similar coloration of the abdomen to that of 
the female the contrast between the two sides in Maeklin’s 
specimen is less striking than in the one described above, and, as 
shown in his colored plate, shows strongly only in the thoracic 
region. ‘There is, however, a distinct asymmetry of the abdomen, 
owing to the more bulging outline of the second abdominal 
segment on the female side. The specimen also shows the wings 
beautifully developed on the male side, and the strong contrast 
between the two antenne. 
Pseudomethoca canadensis is apparently a parasite on certain 


1 Die hermaphroditen und gynandromorphen Hymenopteren. Ber. naturwiss. med. Ver. 
Innsbruck, XXIV, 1808 (1899), pp. 1-96, 1 pl. 
2 Om hermafroditism bland insekterna, samt beskrifning Ofver en i Helsingfors funnen 
hermafrodit af Mutilla obscura Nyl. Ofvers. af Finska Vetensk. Soc. Forhandl. III 1856, 
pp. 106-112, 1 pl. 
