PHILIP P. CALVERT 387 



upper surface of the frons is as well develoi)od in both sexes of ncrrosd as in 

 those of trifida.] 



Eyes above olive green, below clear brown, posterior margin yellow. [The 

 rear of the head immediatelj^ posterior to the eyes is blackish superiorly, 

 however.] 



Thorax clear ashy reddish (bermejizo-ceniciento-claro), mesothorax above 

 olive with the mid-dorsal sulcus rusty brown. Mctathorax with small green, 

 spots arranged thus, 1, 3, 1, 3, 1, sides with four or five small blackish brown 

 spots. 



Abdomen clear ashy reddish, .segment one with i)osterior l)order green, seg- 

 ment two with mid-dorsal line, base on each side antl two pairs of small spots 

 above green, following segments similar to two but the mid-dorsal lino lacking, 

 nine and ten brown (pardos). 



ereagris (cf. anlen, p. 359) — Labrum and face pale oli\-e straw-(;olor, frons 

 with a black intermediate line above. [A black T-spot on the superior sur- 

 face of the frons is as well developed in bt)th sexes of ereagris as in those of 

 trifida.] 



Eyes above obscure blue, below clear brown with an olive reflection, part 

 behind the eyes black above, straw-color below. 



Mesothorax yellowish green on its anterior border, followed by a transverse 

 blackish band, remainder green, mid-dorsal sulcus and a transverse spot 

 blackish brown. Metathorax black with various small green spots arranged 

 thus, 1, 3, 2, 3, 1 and two others at the base of the wings. [This evidently 

 refers to the metanotum only.] 



Abdomen: segment one brown witli a transverse jjosterior green l)and, 

 segment two also brown with mid-dorsal line and anterior to the posterior 

 border of each piece [i. e., those separated by the su])]ilementary, median, trans- 

 verse carina] green, three also brown, base and anterior antl posterior borders of 

 the second piece of the segment on each side green, following segments black 

 with the green weaker and narrower, last black, posterior border of the first 

 piece somewhat olive green, secontl piece rust-color. 



Trifida, septima and nervosa arc inchidcd in the key to the 

 species of Gynacantha in the Biolojijia Centrali-Anierieana,^^ 

 wherein a number of other characters arc employed in (Hstinguish- 

 ing them. Ereagris Gundlach falls under rubric EE of that key, 

 along with nervosa, in having the costal margin not more yellowish 

 than the rest of the wing, the metepimeron not bordered 

 posterioi'ly with blackish. It dilTei's from nerrosn in having: 



The abdomen distinctly constric^ted at segment three. Segment two of the 

 cf is 3.5-3.7 mm. wide at its base (excluding the auricles); segment three is 

 1.05-1.2 mm. wide at its narrowest part and 2.1-2.24 mm. wide at its hind 

 edge; corresponding figures for the 9 are 4.13-4.34, 1.47-1. 68 and 2.17-2.24 

 mm. 



f'" Xcuroptera, pp. 189-190. 



TR.\NS. A.M. ENT. SOC, XLV. 



