ART. 20 REVISION OF THE GENUS WINTHEMIA REINHARD 33 



Gentner) ; Illinois (W. A. Nason, T. R. Frison) ; Ohio (H. J. Rein- 

 hard) ; Massachusetts (H. E. Smith) ; Virginia (J. M. Aldrich) ; 

 and Maryland (R. C. Shannon). 



The species is a common parasite of the army worm. Militaris 

 has also been reported from this host, and may prove to be the same, 

 but I have not been able to locate the type ; the original description 

 is too inadequate to identify the form with certainty. 



(17) WINTHEMIA DEILEPHILAE Osten Sacken 



Tachina deilepJiilae Osten Sacken, Can. Ent., vol. 19, p. 164, 1887. 

 ■ Wintliemia quadripustulata (part) Coqihixett, Revis. Tachin., p. 125, 1897.— 

 Aldrich, Catalogue, p. 474, 1905. 



This species, long submerged in synonymy, may be readily dis- 

 tinguished from all other known species by the presence of one or 

 two slender bristles on each side of the prosternum. Sides of front 

 and face grayish-white pollinose; abdomen red except a broad dark 

 median stripe which expands in front and includes the basal margin 

 of first segment; mid tibiae usually with two stout bristles on outer 

 front side near middle. 



Mal^. — Front (before ocelli) 0.237 of the head width (average of 

 four: 0.25; 0.25; 0.23; 0.22), rather prominent below; parafrontals 

 thickly covered with erect hairs near vertex, becoming thinner or 

 scattered downward ; median stripe red, at triangle fully twice the 

 parafrontal width; verticals two pairs; orbitals none; ocellars well 

 developed; frontal bristles about 10 in number directed inward, 

 extending to middle of second antennal joint and stopping before 

 triangle above, the uppermost one or two bristles smaller than the 

 preceding ones; sides of face bearing a few inconspicuous hairs on 

 inner margins, not unusually narrowed downward; vibrissae some- 

 what approximated about on oral margin but considerably above the 

 lower edge of head ; antennae red, third joint more or less infuscated, 

 about twice as long as the second; arista rather short barely equaling 

 the combined length of last two antennal joints, moderately thick- 

 ened on proximal two-fifths ; palpi yellow ; cheeks gray pollinose on 

 red ground color, in profile about one-ninth the eye height; beard 

 white. 



Thorax black, gray pollinose ; mesonotum marked with five black 

 stripes, the median one narrow but visible before suture in most 

 views ; scutellum red, rather densely gray pollinose ; calypters oqaque, 

 white. 



Abdomen largely red, covered with gi'ay pollen devoid of any 



pattern, fourth segment with changeable spots on basal margin 



above; segments 1 and 2 without median marginal bristles; third 



with a marginal row of 8 to 10; fourth covered with erect 



6G585— 31 3 



