58 University of Michigan 



The male taken at Tumatumari was resting on a twig tip 

 in a dry flat near the river where I also took Metaleptobasis 

 mauritiaP One of the females from Tamanoir, French 

 Guiana, has a remarkable left front wing. The wing is slight- 

 ly shorter than the opposite wing and there are some abnor- 

 malities in the stigma and in veins near the apex of the wing. 

 But the rest of the wing superficially appears normal. How- 

 ever the first antenodal is distal to the first antenodal of the 

 opposite wing about one-fifth or sixth the distance from wing 

 base to antenodal; the second antenodal and the arculus are 

 still more distal; and the nodus still more distal, being distal 

 to the nodus of the opposite wing a distance equal to about 

 one-half the distance from the second antenodal to the nodus : 

 M3 arises slightly distad to the nodus, at the nodus in the op- 

 posite wing; Rs arises near the eighth postnodal, near the 

 sixth in the opposite wing; and Mo arises near the thirteenth 

 postnodal, near the ninth in the opposite wing. From this 

 point distally the wing area has irregular cell structure and 

 evidences of abnormality. Is there any connection between 

 this apical injury and the relatively apical position of the 

 otherwise normal basal wing structures? 



31. Oxy stigma cyanofrons, new species 

 Figures 11, 2"/, 2^,, 60, 103, 104, 171, 172 



Abdomen, male 33 to 36 mm. ; female 26 to 27 : hind wing, 

 male 22 to 23.5 ; female 22 to 22.5. 



Male. — Rear of head light cream, darker shaded above; 

 genae, labrum, nasus and frons bright blue, labrum more or 

 less bordered with black, stipple-edged; rhinarium largely 

 black with blue areas on either side ; vertex black, shining ad- 



" Notes on Neotropical Dragon-flies, Proc. U. S. Nat. Mus., Vol. 48, 1915, p. 

 603. 



