March, 19-^0. J DiCKERSOX & WeISS : EVENIXG PrIMROSE InsECTS. 45 



each body segment bearing a few minute, fine hairs, the dorsal ones 

 being equidistant, more prominent and forming a transverse row; 

 hairs more niunerous on anal segment, head and legs; hooks of anal 

 prolegs forming an apparently continuous, straight or slightly curved 

 line. 



Pupa. — Length 5.8 mm. ^^'idth 1.5 mm. Reddish-brown; seventh 

 abdominal segment tuberculate laterally; last abdominal segment 

 terminating in two ^orsally pointed tubercles, each of which bears a 

 posteriorly pointed, smaller tubercle below it ; each abdominal seg- 

 ment bears a couple of hairs on the side. 



Adult. — Mompha eloiscUa. In Dyar's Catalogue, the following 

 synonyms are noted: magnatclla Zeller, ccnotherccclla Chambers, and 

 lyoncticlla Chambers. Clemens's description of this species follows: 

 " Head, face and thorax silvery white, the latter spotted with black- 

 ish. Labial palpi white with a dark brown spot on the middle of 

 second joint and tw^o dark brown rings on the third one at the base 

 and one at tip. Antennae tawny yellow, white at base. Forewings 

 silvery white with a small tuft of tawny scales at the basal joint of 

 the third fold and a larger patch of the same hue on the inner 

 margin at the end of and above the fold. Between the tufts in an 

 oblique dark brown costal streak nearly joined at an angle by another 

 of the same hue in the middle of the w-ing and exterior to the first 

 tuft is a blackish brown streak wdiich becomes diffuse behind the 

 above while the apical portion of the costa midway between these 

 latter is a rather faint dark spot. Cilia yellowish gray. Hind wings 

 tawny grayish, cilia ochreous." 



As has been stated, this species overwinters in the larval stage in 

 cells in the stalks of evening primrose. Most of these cells are 

 found in the main stem, but the side shoots which arise near the 

 ground are often infested. The lateral shoots near the top or middle 

 of the stem are evidently too small to afford suitable quarters. These 

 cells occur in all parts of the main stem except the extreme tip and 

 in most cases except the lower portion. The first twelve inches of 

 stem above the ground and in some cases more is very often taken 

 up with the channels, excrement, etc.. of Tylodcrma fovcolatum, 

 which l)red there during the summer and as a rule cloisclla cells are 

 scarce in this section. 



The cells may be close together in a stem or far apart and the 



