122 MAINE STATE COLLEGE 



This larva looks much like that of Trypeta pomoneUa and could 

 not be separated without a hand g'iass, but the mouth, head and can- 

 dal spiracles are quite distinct. 



Pupce — Five mm. long by nearly 2.5 mm wide, broadly oblong, 

 straw colored, coarctate. The head end more pointed and showing 

 the cephalic spiracles. The caudal spiracles also apparent. In 

 emerging the fly breaks aAvay the lower half of the first four cephalic 

 segments. The pupa is shown in Plate I, Fig. 4. 



CpaTicAL Remarks. 



Mr. Loew says in the introduction to Part III of his "North Amer- 

 ican Diptera" (Smithsonian Miss. Colls, p. 213) I have been compelled 

 to draw the descriptions of several species from single, often badly 

 preserved specimens, and I am afraid that these descriptions * *■* 

 may sometimes betray the incompleteness of my material." Appre- 

 ciating this fact the critical remarks made below are not given in the 

 spirit of a criticism but to supplement what has been written after the 

 careful examination of an abundance of material. Loew must have 

 examined faded or pale colored specimens as the larger and better 

 developed individuals have the abdominal markings dull black and 

 also the markings on the wings are much too dark to be described 

 as having "a pale brown picture." There are occasionally females 

 with slender abdomens which are without markings. These seem to 

 be unimpregnated or possibly through ovipositing. The intensity of 

 the color in others is variable. There is a dark uninterrupted band 

 across the posterior border of the sixth segment. Loew calls the last 

 abdominal segment of the female the ovipositor, a mistake which en- 

 tomologists made in regard to Trypeta pomonella, Walsh. The last 

 abdominal segment is about as long as the three preceding, conical, 

 truncate at the end, and retracted within it are sheath and ovi- 

 positor. Mr. Loew evidently did not see the ovipositor which we 

 have described and figured. (See Plate II.) He also makes a mis- 

 take regarding the number of abdominal segments, there being seven 

 the one at the base having been overlooked. Therefore, the descrip- 

 tion given by Loew, "the third and fourth segments have, each at 

 its basis, a chestnut cross band interrupted upon its middle, while 

 upon the second segment only a lateral beginning of such a stripe 

 is indicated by a chestnut brown spot," would have to be corrected 

 by saying fourth and fifth and third segments respectively. Mr. 

 Loew is in doubt regarding the number of bristles upon the scutel- 

 lum, which we find is four upon both male and female. In the brighter 

 colored flies there is a decided orange tint, which would require a 

 modification of the statement that the color is "pale clay yellowish." 

 We find that the number of bristles on the border of the front is us- 

 ually three on each side; but it varies from two to four. In some 

 specimens three on one side and four on the other. Mr. Eniertons 

 drawing (Plate I, Fig. 1) shows four. 



