University of Michigan 



PLATE XII 



Hind lobes of the prothorax in dorsal view; figures 155 and 158 by 

 Dr. Calvert. The curve, forming the anterior border of the hind lobe, 

 varies according to the angle at which the lobe is viewed and has no 

 specific significance in the figures. 



Figure 133, Heteragrion flavovittatum, female, collection M. C. Z. ; 

 figures 134 and 135, Heteragrion ictericum, type male and allotype 

 female, respectively; figure 136, Heteragrion melaminim, type male; 

 figures 137 and 138, Heteragrion triangnlare, male and female, respec- 

 tively, both in collection Carn. Mus. ; figure 139, Heteragrion beschkii, 

 male, collection M. C. Z. ; figure 140, female labelled "aurantiacum, von 

 Heyer, B. Ayres", in collection M. C. Z., see footnote 6; figures 141 

 and 142, Heteragrion aurantiacum, male and female, respectively, both 

 in collection Carn. Mus. ; figures 143 and 144, Heteragrion aurantiacum, 

 male and female, respectivelj^ both Sapucay, Paraguay, in collection 

 U. S. Nat. IMuseum; figure 145, Heteragrion consors, male, collection 

 M. C. Z. ; figures 146 and 147, Heteragrion erythrogastrum, male and 

 female, respectively, male, Cristalina, Colombia, February 18, 1917, and 

 female, Rio Sardanilla, C. Z., December 5, 1916; figures 148 and 149, 

 Heteragrion alhifrons, male and female, respectively, both Turrialba, 

 Costa Rica, July 26, 1909, P. P. Calvert; figures 150 and 151, Heter- 

 agrion tricellulare, male and female, respectively, both collection U. S. 

 Nat. ^luseum; figures 152 and 153, Heteragrion alicnum, type male and 

 allotype female, respectively; figure 154, Heteragrion chrysops, male, 

 collection M. C. Z. ; figure 155, Heteragrion flavidorsum, type male; 

 figures 156 and 157, Heteragrion majus, male and female, respectively, 

 Cachi, Costa Rica, collection P. P. C. ; figure 158, Heteragrion angtts- 

 tipenne, male, figured by Calvert (4) ; figure 159, Heteragrion calen- 

 dulnm, type male; figure 160, Heteragrion aeqiiatoriale, male, figured 

 by Calvert (4), and figure 161, female, same species, both in collection 

 U. S. Nat. Museum; figures 162 and 163, Heteragrion mitratuni, type 

 male and allotj'pe female, respectively ; figures 164 and 165, Heteragrion 

 simulatum, type male and allotype female, respectively; figure 166, 

 Heteragrion inca, type male; figures 167 and 168, Heteragrion pcre- 

 grinum, type male and allotype female, respectively; figures 169 and 

 170, Oxystigma petiolatum, male and female, respectively, male, Tuma- 

 tumari, and female, Wismar, British Guiana; figures 171 and 172, 

 Oxystigma cyanofrons, type male and allotype female, respectively. 



