S90 THE ENTOMOLOGIST. 



NOTE ON PARASITES OF ATHERIX IBIS, Fabr. 



My attention has been called recently to the interesting 

 contribution, by Mr. T. R. Billups, on the habits and parasites 

 of Atherix ibis, published (p. 193) in August number of the 

 * Entomologist.' 



I was particularly interested in his descriptions of the two 

 hymenopterous parasites reared from it, and write now to correct 

 the generic position assigned them. 



Mr. Billups is certainly in error in his generic determinations 

 of these parasites. Figures 5 and 6 do not belong to the genus 

 Teleas, but to the genus Trichogramma in the family Chalcididae, 

 sub-family Trichogramminae. I have reared various species of 

 this genus in America from lepidopterous, hemipterous, and 

 homopterous eggs ; also from Coccids. Teleas, although an 

 egg-parasite, is widely different, and belongs to the family 

 Proctotrupidae, sub-family Platygasterinse. The genus is known 

 at once by having a distinct marginal vein and an oblique stigmal 

 vein, while the hind wings are wider, and the antennae differently 

 shaped. 



Figures 3 and 4 do not represent male and female of a species 

 of Antceon, but are male and female of a species of Megaspilus in 

 the family Proctotrupidse, sub-family Ceraphroninse. I have 

 reared species of this genus from Aphids and dipterous puparia. 

 Antceon is a Proctotrupid genus in the sub-family Dryininse, and 

 shows but a superficial resemblance to Megaspilus. It is at once 

 distinguished from it by its more highly developed venation, the 

 front wings having two basal or brachial cells. The genus is 

 probably parasitic on homopterous insects, like an allied genus 

 Gonatopus. 



W. H. ASHMEAD. 

 U. S. Dept. of Agriculture, Washington, D.C., Aug. 14, 1889. 



[It is pleasing to find that the ' Entomologist' is so critically 

 read by members of the U. S. Dept. of Agriculture, Washington, 

 and I am obliged to your correspondent, Mr. W. H. Ashmead, for 

 calling my attention to the error respecting the genus Teleas 

 (Entom. 194), which most possibly is incorrectly named; but, as 

 regards Nos. 3 and 4, I sin in very good company, the insects 

 having been submitted to the Rev. T. A. Marshall, and by him 

 determined as Antceon alorus. — T. R. B.] 



Description of Trichogramma. Plate 7, figs. 5, 6. 



When I drew the figures, illustrated on plate 7 of this volume 

 of the ' Entomologist,' I took careful descriptions of the living 

 insects under consideration. Appended are my notes : — 



