254 Annals Entomological Society of America [Vol. VI, 



in L. sericata Meig. An examination of the type specimen 

 and also of four cotypes shows that the form may be referred 

 to L. sericata Meig. 



Lucilia unicolor. 



Five 9 specimens from New Mexico, Mexico and British 

 Columbia. They are all L. caesar Linn. The second pair 

 of ocellar bristles is fairly strong in the type specimen, but in the 

 co-types there is variation and they become less strong, in any 

 case all come within the limits of variation of L. caesar. 



Lucilia purpurea. Town. 



There is no character in the description of this form which 

 serves to separate it from L. caesar Linn. In the description 

 it is stated that "the whole body is purplish, strongly violet 

 tinged, especially in the 9." This is certainly somewhat 

 of an unusual hue for caesar, but a series can be arranged from 

 the U. S. N. Museum material showing all gradations from 

 this form to almost pure green. An examination of the type 

 and co-type shows that there are no structural characters 

 separating the form from L. caesar and the name purpurea 

 Town, must therefore sink. 



Lucilia australis. Town. 



Two 9 9 from the southern states and one cf from Alaska. 

 The type and one co-type, both from the southern states, 

 must be referred to L. pilatei. Hough. The cf from Alaska 

 agrees with L. caesar Linn, in everything except the width of 

 front which appears to be very slightly greater than in L. 

 caesar. This, however, is probably partly optical, as the inner 

 margins 'cf the eyes, in the region of the ocellar triangle, are 

 blackish, and thus appear to be part of the front. 



Lucilia infuscata. Town. 



From the description (Townsend. Taxonomy of Mus- 

 coidean Flies, p. 123) it is evident that the cf cf are L. caesar 

 Linn, as all the characters enumerated come within the limits 

 of variation of that species. 



The 9 9 of which there are six, "can be told from caesar 

 ■only by the narrower front and darker basal segment." As to 

 the latter of these characters the study in variation for L. 

 caesar brought out the fact that in that species the first segment 



