1913] Variation in the Genus Liicilia. 255 



of the abdomen is not unicolorous with the other segments, 

 but darker. As to the former character, i. e., the 'narrower 

 front,' the more general condition met with in caesar as to 

 width of front is less than one third head width, or to be more 

 specific three tenths head width; inf^iscata is described as having 

 the front two-sevenths head width and the difference between 

 three-tenths and two-sevenths is one-seventieth, which 

 reduces ,the character as a differentiating one to an absurdity. 



An examination of the type and co-type bears out the 

 above remarks and proves the form to be L. caesar Linn, 

 with the exception of one co-type which is Phormia regina 

 Meig. 



Lucilia oculata. Town. 



Six cf cf and two 9 9 . The former are L. caesar Linn. 

 and the latter are L. pilatei Hough. The author of oculata 

 lays stress on the color of the face and antennae, which are 

 described in this instance as brownish yellow instead of black. 

 After examining the U. S. N. Museum caesar material the 

 writer found that taking three specimens from England, one 

 from Mexico and one from Connecticut an excellent gradation al 

 series could be made, showing transition from black to light 

 reddish brown. In this connection it may be stated that the 

 late Mr. D. W. Coquillett collected a specimen of L. pilatei 

 Hough, in Washington, D. C, which exhibits some remarkable 

 colorational features. The whole fly is quite light, especially 

 the legs and venter, but it is distinctly 'shot' with green and 

 blue, so that in different lights it takes on different colors; the 

 parafacials are pale reddish yellow. It is the experience of the 

 writer that, within certain limits, the earlier a specimen of 

 Lucilia is captured after issuance the lighter will be the color. 



The synonymy indicated in the above notes on the types 

 and co-types of Lucilia species in the U. S. N. Museum may 

 be listed as follows; 



Luc 

 Luc 

 Luc 

 Luc 

 Luc 

 Luc 



lia morilli, Town = Pseudopyrillia comicina, Fab. 



lia nigripalpis Town = Lucilia sylvarum, Meig. 



lia angustifrons Town = Lucilia caesar, Linn, (abnormal fly). 



lia giraulti Town = Lucilia sericata Meig. 



lia barberi Town = Lucilia sericata Meig. 



lia unicolor Town — Lucilia csesar Linn. 



Lucilia purpurea Town = Lucilia cassar Linn. 



Lucilia australis Town = Lucilia caesar Linn. 



Lucilia infuscata Town = Lucilia caesar Linn. 



Lucilia infuscata Town= (1 cotype) = Phormia regina Meig. 



Lucilia oculata Town, male = Lucilia caesar Linn. 



Lucilia oculata Town, female = Lucilia pilatei, Hough. 



