134 PROC. ENT. SOC. WASH., VOL. 23, NO. 6, JUNE, 1921 



Zenillia R.-D. Myodaires, 152, 1 (1830). 

 syn. Atilia R.-D. 1863. 

 Clemelis R.-D. 1863. 

 Elpe R.-D. 1863. 

 Myxexorista B. B. 1891. 

 Nilea R.-D. 1863. 

 SagarisR.-D. 1863. 

 Tritochaeta B. B. 1889. 

 Zelinda R.-D. 1863. 



Zenillia roseanae was originally described by Brauer and von 

 Bergenstamm in Denkschr. Akad. Wien. LVIII, 332, (1891) 

 under the genus Myxexorista. As the original description is 

 rather brief, I have prepared a new one from the specimens 

 reared from Pyrausta which has been made sufficiently detailed 

 for purposes of identification. 



The adult (Fig. 18) is black, the calypteres brownish, the wings hyaline. 



Male. Front, seen from above about four-fifths as wide as eye; frontal 

 vitta dark brown; pollen of para-frontals, para-facials and cheeks bluish grey; a 

 single row of strong frontal bristles and outside this several rows of fine hairs; 

 three to five frontal bristles below the base of the antennae, the row extending 

 below the apex of the second antennal segment; para-facials bare; facial ridges 

 ciliate on about the lower half; cheeks about one-fifth eye-height; eyes densely 

 hairy; palpi black; occiput flat; antennae as long as the facial plate, the third 

 segment about five times the length of the second; the arista thickened on 

 its basal half. 



Mesonotum black, thinly dusted with greyish-blue pollen, with one median 

 and two pairs of lateral black vittae not very apparent from above; an irregular 

 black vitta adjacent to the margin of the humeral callus; pleurae blue-black, 

 very thinly dusted; 4 sterno-pleural bristles 1:2:1; 4 post-sutural and 3 post- 

 acrostichal bristles; scutellum rather thinly pollinose, bearing 3 pairs of marginal 

 bristles, a pair of cruciate, upwardly directed apical bristles and a pair of discal 

 bristles. 



Abdomen with segments II-IV greyish pollinose anteriorly, the bands of pollen 

 interrupted by a dorsal median vitta; first segment with a pair of marginal 

 bristles, sometimes feeble; second segment with a pair of discals and a pair of 

 marginals; third segment with a pair of discals and a marginal ring; fourth seg- 

 ment with numerous scattered bristles; hypopygium not prominent, the visible 

 portion polished black; hind tibiae regularly ciliate though one of the bristles 

 toward the middle of the row is often larger than the others. 



Female. Two forwardly directed and one backwardly directed orbital bristles 

 on each side; front, seen from above about as wide as eye; antenna not extending 

 quite the full length of the facial plate, the third segment 3.5-4 times as long as 

 the second. 



The male genitalia have been represented (Fig. 19) as they present characters 

 of value for the recognition of the species but it is not necessary for the purpose 

 of this paper to describe them in detail. The female internal reproductive sys- 

 tem corresponds in form to that of the species of Group VI in the system of Pan- 



