205 



INTRODUCTORY PAPERS ON ICHNEUMONID^. .—-' 



By John B. Bridgman and Edward A. Fitch. 



No. v.— OPHIONID^ (co7itinued). 



C. Abdomen red and black ; scape pale (red or yellow) beneath. 

 A. Hind femora red, or greater part so. 



a. Hind tibiae red, or apex dark. 



=1= Hind coxee red, aculeus rather less than half of abdomen (male and 



female). 

 f Post-petiole transverse or subtransverse. - litoralis, 2 — 2J lines, 

 ff Post-petiole elongate or subquadrate. 



Head behind the eyes dilated ; hind coxae generally fusco- 

 maculated. - . - - 38. hydropota, H — 2 lines. 

 Head behind the eyes not dilated ; coxae entirely red. 



63. riifiventris, 2 — 2^ lines. 

 =:--* Hind coxae partly red. 

 I Aculeus of female short, base of antennae reddish. 



rujicornis, 3 — 2^ lines, 

 \\ Aculeus of female rather less than half of abdomen. 

 § Post-petiole longer than wide, or subquadrate (male and female j. 



38. hydropota, H — 2 lines. 

 §§ Post- petiole transverse or subtransverse (female). 



litoralis, 2 — 2^ lines. 

 :;<** Hind coxae black ; aculeus short. 



Abdomen red, base black. - - 56. paludicola, 2 — 2 J lines. 

 00 Middle of abdomen red. - - - 45. lovgipes, 2 — 2]- lines. 



000 Incision of two sides of 3rd and belly of -Ith to 6th segments red. 



erythrojjyya, 2 — 2^ lines. 



0000 Apex of segments 2nd to 4th red ; 5th red ; base of back black ; 



6th and 7th towards the belly red. - 5. alternans, 2 lines. 



b. Apex and before the base of hind tibiae more or less dark. 

 -1= Aculeus of female about half of abdomen. 



1 Margin of 3rd to 7th segments and sides pale. 



50. vmlticincta, 2 — 2k lines. 

 ff Segments 3rd to 6th chestnut, with black dorsal marks. 



46. maculata, 3 lines. 

 ** Aculeus rather less than 1st segment of abdomen. 



More or less of apex of 1st, 2nd, and 3rd segments red. 



barrettii, 3 lines. 

 *=!'-* Aculeus very short. 



I Head buccated ; sides of abdomen sometimes red-marked (male 

 and female). . - - . clandestina, 2^ — 3 lines. 

 \\ Head narrow behind the eyes; 3rd to 7th segments partly red; 

 extreme base of hind tibiie yellowish (male and female). 



9. argentata, 2^— 2| lines. 



c. Base and apex of hind tibiae dark. 



••:= Head narrow behind the eyes ; aculeus of female very short. 



f Hinder coxae black. 



\ Front coxae reddish yellow. 



§ 1st, 2nd, and 3rd segments red-margined. - tricincta, 3 lines. 



