1878 THE BUTTERFLIES OF NEW ENGLAND. 



long, oval. Areolet of fore wings pentangular. More than halt of first abdominal 

 segment slender, its spiracles much nearer to apex than to each other ; gastrocoeli 

 large but shallow. Abdomen of ? acute at tip, the last ventral segment retracted; 

 (J ventral segments two to four with a longitudinal fold. 



Hoplismenus morulus (Say). PL 88, fig. 9. 



Ichneumon morulus Say. Ichneumon calcaratus Provancher. 



Blaclv ; face, clypeus, scape beneath, and sometimes spot on scutellum, $ , and annu- 

 lus on flagellum, ?, white or pale yellowish; tibiae and tarsi bright yellow; wings 

 uniformly fuliginous. Length, J ?, 15 to 16.25 ram. (After Cresson.) 



I have seen two specimens of this insect, one male and one female. One 

 was sent me by Mr. Scudder and was reared by Miss Pierce from the 

 chrysalis of Polygonia interrogationis at Cambridge. The other was 

 sent me by Mr. H. H. Lyman of Montreal who reared it in August, 1875, 

 from a chrysalis of Euvanessa antiopa, at Portland, Me. The parasite in 

 issuing decapitates the chrysalis (88:16). Mr. Cresson records the 

 species from Canada, Connecticut, New York, New Jersey and Virginia. 



Genus TKOGUS Gravenhorst. 



Mesonotum without parapsidal grooves ; mesoscutellum strongly elevated, generally 

 subpyraraidal ; metathoracic spiracles oval. Areolet of fore wings pentangular. First 

 segment of abdomen bent at apex, basal half slender, apex much expanded, spiracles 

 closer to apex than to each other ; base of second segment with lateral pits (gastro- 

 coeli) ; ? abdomen obtuse at tip, ovipositor hidden; the last ventral segment but 

 slightly retracted, ventral segments four to eight smooth, flat, without longitudinal 

 fold. 



Table of Species. 



Uniformly brown exesori us. 



Uniformly black obsidianator. 



Trogus exesorius BruUe. PI. 88, fig. 3. 



Entirely fulvo-ferruginous, legs paler, tibiae and tarsi golden yellow; antennae 

 sometimes dusky or black above; wings uniformly fuliginous, with a strong aeneous 

 or violaceous reflection. Length, $ ?, 17 to 20 mm. (After Cresson.) 



This is the most abundant of the butterfly parasites which have been 

 sent me. It seems to be almost exclusively a parasite of the different 

 species of ewallow-taila. Dr. Packard says concerning its hosts and local- 

 ities : "Bred from puj)a of Papilio asterias [polyxenes] by Dr. Harris, E. 

 Norton, E. T. Cresson, etc., aj^pearing at Cambridge, June 20th; also 

 from P. troilus [Euph. troilus] (Mark) and P. turnus [Jas. glaucus] (P. 

 S. Sprague) ; also from P. ajax and P. marcellus [Iphiclides ajax] West 

 Virginia (Norton)." Professor Riley reared it in Missouri from Iphiclides 

 ajax, Papilio polyxenes, Euphoeades troilus and Jasoniades glaucus. Mr. 

 Mundt has reared it in Illinois from the first and last of these. Mr. Lyman 

 has reared it at Portland, Me., from polyxenes, Professor Cook in Michigan 

 from troilus, and Mr. W. H. Edwards in West Virginia from ajax. The 



