74 University of Michigan 



PLATE V 



Diagrammatic patterns of head coloration ; figures 34 and 41 by 

 Dr. Calvert. 



Figure 30, Hctcragrion crythrogastnun, male, Cristalina, Colombia, 

 February 18, 1917, and figure 31, female, Rio Sardanilla, Canal Zone, 

 December 5, 1916; figure 32, Heteragrion albifrons. male, and figure 

 33, female, both sexes Turrialba, Costa Rica, July 26, 1909, P. P. Cal- 

 vert; figure 34, Heteragrion tricellularc, male, San Geronimo, Guate- 

 mala, Champion, collection P. P. C, and figures 35 and 36, male and 

 female, respectively, collection U. S. Nat. Museum; figure 2>7, Heter- 

 agrion alienum, type male, figure 39, allotype female, and figure 38, 

 male, Atoyac, Vera Cruz, April, H. H. Smith, collection U. S. Nat. 

 Museum ; figure 40, Heteragrion chrysops, male, collection M. C. Z. ; 

 figure 41, Heteragrion ftavidorsiim, type male; figure 42, Heteragrion 

 majus, male, and figure 43, female, both .sexes, Cachi, Costa Rica, col- 

 lection P. P. C. ; figure 44, Heteragrion aequatoriale, male, and figure 

 45, very teneral female, both studied by Calvert (4), and in the col- 

 lection U. S. Nat. Museum; figure 46, Heteragrion calendulum, tj'pe 

 male; figure 47, Heteragrion inca, type male. 



