HETAERINA. 61 



differs, in the male, by having the basal sanguineous spot larger 

 and exteriorly convex ; the superior appendages have the middle 

 tubercle triangular; the female has the yellow abdominal line hardly 

 interrupted, the base of the wings yellowish-fuscous. 



Length 43 — 46 millim. Alar expanse 54 — 62 millim. 



Hab. Pecos River, Western Texas; Mexico; Cordova; Atli- 

 huazan; Portrero (Saussure). 



7. H. tricolor! 



Calopteryx tricolor Burm. ! Handb. II, 827, 7. Selys ! Synops. Calopt. — 

 Hetaerina tricolor, 42, 52. Selys! Monog. Calopt. 136, 52; tab. xii, 

 fig. 5. Walk.! Catal. 629, 25. 



Brownish-black ; thorax with a humeral yellow stripe ; sides 

 yellow, with three brownish-black stripes ; feet black, tibiae exte- 

 riorly fuscous ; abdomen brownish-black ; appendages black, the 

 superior ones forcipated, interiorly bi-excised; inferior ones short, 

 cylindrical, the apex truncated ; wings hyaline, anterior ones san- 

 guineous at base, posterior ones fuscous at base, all the wings with 

 a fuscous apical margin; pterostigma black {£), or they are hya- 

 line with the base somewhat yellowish, the pterostigma whitish- 

 yellow (female). 20 — 24 antecubital cross-nervules. 



Length 42 — 50 millim. Alar expanse 60 — 64 millim. 



Hab. Philadelphia ; Georgia. 



The variety H. limbata Selys, from Georgia, is a little smaller, 

 the apex of the wings is more infuscated. 



8. H. titia ! 



Libellula titia Drury, II, 83; tab. xlv, fig. 3. — Calopteryx titia Burm.! 

 Handb. II, 826, 3. — Hetaerina titia Selys ! Synops. Calopt. 43, 53. 

 Selys ! Monog. Calopt. 138, 53. Walk. Catal. 630, 26. 



Black; head, thorax, feet and abdomen black; superior append- 

 ages forcipated, interiorly with a basal tooth and middle dilatation; 

 inferior ones short, cylindrical, obtuse ; wings opaque fuscous, upon 

 the middle obliquely hyaline ; superior ones sanguineous at base ; 

 pterostigma yellow (J 1 ), or they are opaque, fuscescent, with the 

 apex of the superiors hyaline, the pterostigma white ( 9 ). 19 — 22 

 antecubital cross-nervules. (From De Selys' description.) 



Length 41 — 46 millim. Alar expanse 52 — 60 millim. 



Hab. Mexico ; Honduras. 



