150 Journal Xew York Entomological Society, t^o'- xxn- 



ened at their distal ends and two setae are pointed, but these latter, 

 like all setre of the head, are flat. A small area on the tip of each lobe 

 is covered with fine, short hair. The mandibles, PI. IV, fig. 8, are 

 short, heavily chitinized and not deeply notched. The frons is 

 glabrous and without pattern. Its two middle setre are nearer to each 

 other than to the lateral setae. 



The thorax has the first segment heavily chitinized, with a well 

 marked dorsal suture along the median line. A row of five setae is 

 visible from above on each side of this segment. The second and 

 third segments are not heavily chitinized. Each of them has a single 

 dorsal seta in front of the gills and nearer the median line. On the 

 ventral side each thoracic segment bears a strong seta outside of each 

 coxa. 



The abdomen has circular prolegs on segments three to six in- 

 clusive and oval prolegs bearing a single line of hooks on the last 

 segment, as in E. fiilicalis. On the dorsal side there is a single seta 

 back of each group of anterior stigmatal gills, and on the ninth seg- 

 ment a crescentic line of six setae. On the caudal border of the last 

 segment there are four strong setae, PI. IV, fig. lo. 



Only one specimen of this species was found. 



Species B, the larger South American larva, measures fifteen mm. 

 in length and three mm. in breadth. Its form is more depressed than 

 the small South American species but less flattened than E. fulicalis 

 In color it is uniform brown with lighter gills. Its gills follow the 

 same general arrangement as the preceding species. The infra- 

 stigmatal gills are not present on the second and third thoracic seg- 

 ments. On the abdomen they form a continuous line on each seg- 

 ment, rather than forming groups, as in the other Colombian species. 

 The supra-stigmatals are absent from the first thoracic segment, but 

 present on all other segments, except the last abdominal. The gills 

 are more numerous than on either of the two preceding species, as 

 many as eighteen being present on one side of some segments. In 

 number they vary greatly. 



The head is more flattened than the head of the other South 

 American species. The frons and adfrontals are glabrous and have a 

 color pattern of minute dark hexagons. Other parts of the head arc 

 glabrous and without pattern. The labrum has three setas on each 

 lobe flattened and expanded at their distal ends. The distribution of 



