Vol. XXX] ENTOMOLOGICAL XF.WS. l6l 



bb. Metallic green of each mesepisternum continuous, contiguous to 

 the mid-dorsal carina (or nearly so) throughout its entire length, 



tit la and other species 



We should, then, find females in which the anterior and pos- 

 terior metallic green spots of tricolor females approach and 

 finally fuse with each other and some in which the posterior 

 spot becomes connected with the mid-dorsal carina. The pres- 

 ent Guatemalan material does not furnish any of these inter- 

 gradations, but two females from the Rio Machuca, Costa 

 Rica, January, 1907, by Prof. P. Biolley, cited on page 345 of 

 the Biologia, afford some of the intermediate conditions sought 

 for. 



One of them has the upper end of each posterior (superior) metallic 

 green spot connected by a narrower curved stripe of metallic blue 

 with a black line which runs contiguously to the whole length of the 

 mid-dorsal carina ; the distance between the anterior and posterior 

 metallic green spots however is greater than the greatest dimension of 

 the anterior spot. 



The other female has the posterior metallic green spot more broadly 

 connected at its upper end with a narrow metallic green stripe which 

 borders the black line that, as in the first female, runs contiguously 

 to the whole length of the mid-dorsal carina ; this narrow, bordering 

 metallic green stripe unites with the postero-mesal angle of the anterior 

 metallic green spot. This latter female suggests that a broadening 

 laterad of the "narrow, bordering metallic green stripe" may be the 

 method by which the transition from the thoracic pattern of typical 

 tricolor female to that of typical titia female is made. 



Hetaerina macropus Selys. Cayuga, forest stream, May 31, 1 $ . 

 Escuintla, February, 1 $, July 10, 1 9. Mazatenango, in forest, 

 July 19, 1 $ . 



The Escuintla $ has no stigma on one front and one hind wing, 

 the 9 none on the right hind wing ; in all three wings a more oblique 

 thickened postnodal (postcubital) cross-vein represents the missing 

 part. The female differs from the characters stated for macropus on 

 page 347 of the Biologia volume (under H. capitalis 9 ) in that the 

 metallic green stripe on the mesepimeron reaches to the upper end of 

 the sclerite. // the differentials of the females of macropus and of 

 capitalis there given be correct, one female (at least) from Cacao, 

 Alta Vera Paz, Guatemala, referred to macropus on page 346 of the 

 volume should be corrected to capitalis. 



Hetaerina capitalis Selys. Cayuga, forest stream, May :u, 1 $, 

 "body black, thorax with obliqur dark brown streaks; base of 



