76 University of Michigan 



PLATE VI 



Figures 48 to 53, inclusive, diagrammatic patterns of head colora- 

 tion ; figures 54 to 62, inclusive, ventral view of genital valves and 

 ovipositors. 



Figure 48, Heteragrion simtdatum, type male, and figure 49, allo- 

 type female, very teneral ; figure 50, Heteragrion mitratum, type male, 

 and figure 51, allotj'pe female; figure 52, Heteragrion peregrinum, type 

 male, and figure 53, allotype female. 



Figure 54, ventral view of genital valves and ovipositor of Heter- 

 agrion ictericum, female, Tamanoir, Mana River, French Guiana, 

 June 17, Klages, collection Cam. ]\Ius. ; figure 55, same of Oxystigma 

 pctiolatum, female, Wismar, British Guiana, January 31, 1912; figure 

 56, same of Heteragrion mitratum, female, Cristalina, Colombia, Feb- 

 ruary 13, 1917 ; figure 57, ventral view of ovipositor of Heteragrion 

 aliennm, allotype female; figure 58, same of Heteragrion erythrogas- 

 irnm, female, Cristalina, Colombia, February 15, 1917; figure 59, same 

 of Heteragrion peregrinum, female, Cristalina, Colombia, February 12, 

 1917; figure 60, same of Oxystigma cyanofrons, allotype female; figure 

 61. same of Heteragrion albifrons, female, Turrialba, Costa Rica, July 

 26, 1909, P. P. Calvert; figure 62, same of Heteragrion majus, female, 

 Cachi, Costa Rica, collection P. P. C. 



