HYMENOPTEROUS PARASITES. 



1879 



only exception to its parasitism upon swallow-tails is sent me by Mr. 

 jNlundt who reared it from \'anessa cardui. Mr. Cresson records the 

 species as captured in Canada, New York, Pennsylvania, Delaware, 

 Georgia and Illinois, and hazards the opinion that it will pi-obably prove 

 to be a synonym of Ichneumon pennator Fabricus. 



Trogus obsidianator BruUe. 



Deep black, immaculate; antennae orange-yellow; win^s uniformly blackish fuligi- 

 nous, with a strong aeneous reflection; first abdominal segment bicarinate, the cari- 

 nae becoming obsolete before reaching the tip. Length, ,? $ , 20 to 22.5 mm. (After 

 Cresson. ) 



This insect has been reared from the chrysalis of Papilio polyxenes by 

 Professor Riley. Mr. Cresson records the species from Pennsylvania, Illi- 

 nois, Georgia and Texas. 



Genus HEMITELES Gravenhorst. 



Metathorax with parapsidal grooves. Areolet of the fore wings pentangular In po- 

 sition, but incomplete, the outer nervure hyaline or wanting. Legs and antennae 

 generally slender. Spiracles of first abdominal segment more approximate to each 

 other than to the apex of the segment ; gastrocoeli at base of second abdominal seg- 

 ment wanting; ovipositor distinctly exserted, short. 



The species of this genus sire as a rule parasites of parasites or, as they 

 are called, "hyperparasites" or "secondary parasites." There is no well- 

 proven exception to this rule on record so far as I know. 



Table of Species. 



Thorax marked with red; wings banded with brown utilis. 



Thorax black, immaculate ; wings hyaline lycaeuae. 



Hemiteles utilis Norton. PI. 88, fig. 4. 



Female. — Black; antennae, anterior portion of prothorax, shoulders and a spot at 

 sides of mesothorax, the legs, including coxae and trochanters, red; middle of poste- 

 rior femora and extremity of tibiae brownish. Wings hyaline, nervures brown, white 

 at base; tegulae white ; stigma brown, without a white spot at base; a large brown 

 band extends from the base of the stigma across the wing ; areolet surrounded with 

 white nervures, the exterior nervure wanting. Abdomen oval from the second seg- 

 ment, black, polished, shining; joints 1 and 2 reddish at base and tip, the others mar- 

 gined with reddish posteriorly. Ovipositor a little longer than half the body, almost 

 entirely reddish. Length, 3.75 mm. 



This species is introduced into this paper for the reason that I find in the 

 notes sent me by INIr. A . H. Mundt the statement that from an over-win- 

 tered pupa of Heraclides cresphontes he bred a parasite which was deter- 

 mined for him by Mr. Cresson as H. utilis. 



It seems likely that there remains some yet undiscovered primary para- 

 site of crespontes from which this secondary parasite came. 



