AGRION. 93 



38. A. calidum! 



Agrion calidum Hagen ! 



Yery much like the preceding, differs in having the dorsum of 

 the thorax black, each side a broad violaceous stripe ; sides pale, 

 a broad stripe above, and an abrupt line upon the middle black ; 

 feet almost entirely black ; abdomen black, segments 9 — 10 blue 

 above, margin of segment 10 less excised ; superior appendages 

 reniform, the internal tooth longer; inferior ones oblong, broad, 

 the apex excised ; wings hyaline sub-infumated, pterostigma larger, 

 black. Fifteen postcubital cross-nervules. 



9 Head luteous (?), a stripe superiorly and a post-occipital 

 streak black ; margin of the prothorax behind sub-excised in the 

 middle and each side, the thoracic process on each side laminated, 

 oblong, curved exteriorly; dorsum of the thorax luteous (?), with 

 a black stripe in the middle, sides luteous, with a black humeral 

 line, dilated anteriorly; feet pale, the femora exteriorly, the 

 tibiae interiorly and the tarsi black; abdomen luteous (?), seg- 

 ment 2 each side, with an ante-apical spot, and 3 — T upon the 

 apex black ; dorsum of 10 almost entirely cleft ; appendages short, 

 luteous; no ventral spine; wings sub-infumated, pterostigma large, 

 rufous. 



Length 37 — 40 millim. Alar expanse 46 — 50 millim. 



Hab. Tampico, Mexico (Saussure) ; California. 



I saw a male taken at the same place (Tampico), allied to this 

 species, but the epistoma was brassy-green, the sides of the thorax 

 had no middle black line ; the appendages destroyed. Is it a dis- 

 tinct species ? The male from California is without head and 

 appendages, and is, as yet, doubtful. 



39. A. immundum! 



Agrion immundum Hagen ! 



Most like A. apicale, but differs in the color, being luteous, per- 

 haps rosaceous ; dorsum of the thorax with a middle black stripe; 

 a humeral black line, which is cleft at the wings ; abdomen ob- 

 scure luteous, segment 2 with a spot each side before the apex, 

 the apex of 3 — 6, and 7 entirely black, the following ones blue 

 (^) or luteous ; segments 2 — 7 each side with a black streak, the 

 following ones blue (?) ; superior appendages obtuse, excised at 

 the apex ; the inferior ones broad, sub-bifid at the apex, the supe- 



