DIDYMOPS. 135 



triangular basal spot to the posterior ones, a large fenestrated, 

 nodal spot, and the apices of all the wings brownish, pterostigma 

 small, black; membranule large, white, the apes brownish-cinereous. 



Var. The spots of the wings smaller, or almost wanting. 



Eight antecubitals; 5 — 6 postcubitals; two discoidal areolets. 



Length 63 millim. Alar expanse 88 — 93 millim. Pterostigma 

 3 millim. 



Uab. Pecos River, Western Texas ; Georgia (Abbot) ; Mary- 

 land. 



A large specimen (J') from Georgia, has 72 millims. length ; 

 alar expanse 102 millim., the fuscous spots of the wings are br.oader 

 but it is hardly distinct. 



DIDYMOPS Rambuk. 



Triangles with transverse veins ; tarsal nails bifid, the branches 

 equal. 



1. D. transversa! 



Libellula iransversa Say, Journ. Acad. VIII, 19, 3. — Epophthalmia cinna- 

 mon ea Burm. Handb. II, 845, 2. — Dichjmops Servillii Ramb. ! Neu- 

 ropt. 142, 1. 



Rufo-fuscous, villous ; front with a transverse, yellow fascia, 

 above excavated, each side with a yellow spot ; thorax rufo-fuscous, 

 each sid'e with an oblique, whitish stripe ; abdomen stout, almost 

 cylindrical, rufo-fuscous, the segments paler at base ; appendages 

 short, fuscous ; vulvar lamina truncatedly-excised, short ; feet 

 rufous, tibiiB yellow exteriorly, tarsi black ; wings hyaline, veins 

 rufous, with a short, rufo-fuscous, basal, longitudinal spot, ptero- 

 stigma small, fulvous ; membranule white, the apex cinereous. 

 (Female.) 



Appendages of the male lanceolate, subarcuated, the apex exte- 

 riorly snbdenticulated; the inferior appendage equal to^the supe- 

 riors. (From the description of Say.) 



12 — 13 antecubitals; nine postcubitals; two discoidal areolets. 



Length 55 millim. Alar expanse 15 — 80 millim. Pterostigma 

 2 millim. 



Hah. Carolina (Zimmerman) ; Washington (Osten Sacken) ; 

 Massachusetts (Say) ; Pennsylvania (Ziegler) ; New York (Asa 

 Fitch). 



