no- 3619 CADDIS FLIES, V — FLINT 9 



Genus Macronema Pictet 



The taxonomic situation in this genus in the American tropics is, 

 at best, extremely confusing. To add to the difficulty, many of the 

 species are known only from a single specimen, often a female. The 

 group of species near hyalinum Pictet (including ulmeri Banks and 

 erichsoni Banks) seem to have distinctive color patterns but no 

 obvious differences in the male genitalia. On the basis of color alone 

 specimens of ulmeri can be recognized from Peru to Panama and 

 Surinam. Another group is centered on digramma McLachlan (in- 

 cluding subaequalis Banks). In this group, every specimen looks 

 different from the next, but all could be the result of different degrees 

 of development of the same basic pattern. The genitalia of the few- 

 males seen look identical and, in fact, are not clearly different from 

 those of the hyalinum group. The percitans group (including the 

 remainder of the Banks species) offer differences in the genitalia, 

 especially the tenth tergum and aedeagus, often coupled with recog- 

 nizable color differences. Yet the genitalia of percitans and picteti 

 seem identical, although the coloration is quite different. 



Banks has sketched (1924) the tips of the forewings showing the 

 color pattern of lachlani, burmeisteri, muelleri, pertyi, fraternum, hageni, 

 and braueri. 



Macronema aeneum Hagen : See Phylloicus aeneus (Hagen) . 



Macronema chalybeum Hagen: See Phylloicus chalybeus (Hagen). 



Macronema poeyi Banks: See Leptonema poeyi (Banks). 



Macronema braueri Banks 



Macronema braueri Banks, 1924, p. 454/ — Fischer, 1963, p. 178. 



This Brazilian species is known only from the female holotype. 



Macronema burmeisteri Banks 



Macronema burmeisteri Banks, 1924, p. 452. — Fischer, 1963, p. 178. 



Lectotype, female: "Yurimaguas Peru 10 April Parish Coll," 

 "Type 14836," "Macronema burmeisteri Bks. Type." 



This species is known from the female sex. 



Macronema erichsoni Banks 



Plate If 



Macronema hyalinum Pictet, var. — Ulmer, 1913, p. 395. 



Macronema erichsoni Banks, 1920, p. 356.— Mosely, 1931, p. 170.— Fischer, 1963, 

 p. 184. 



The photograph (pi. If) of the wings was made from a specimen 

 identical to the female holotype in coloration. The species was 



256-175—67 2 



