June, 1914-] Lloyd: Lepidopteroul Larv^ in Rapid Streams. 149 



larvae, two being not an uncommon number for a cluster. Other- 

 wise the young larvae agree in structure with the mature larvae. 



Pupa. — Pi. Ill, figs. 6 and 7. Length 6 to 7 mm., breadth 2 mm. 

 Color of alcoholic specimens, head and thorax dark brown above, 

 appendages lighter, except caudal margin of wing-pads, which are 

 dark. Abdominal segments dark brown above ringed with cream 

 color at the edges of segments, sides and venter of abdomen cream 

 color. Anal anchor dark brown, almost black. Third and fourth 

 abdominal segments with large tubular spiracles surrounded by a 

 light area which is encircled by a narrow chitinous band. Vestigial 

 spiracles are visible on abdominal segments 5 to 9, inclusive. Vestigial 

 prolegs are on abdominal segments 6 and 7. The strongly chitinized 

 abdominal anchor measures one mm. from tip to tip. The positions 

 of setae are shown in PL III, figs. 6 and 7. 



Two Allied Species from Colombia, South America. 



Besides the species, Elophila fulicalis, from New York State two 

 species of lepidopterous larvae were taken from a swift stream in 

 Colombia, South America. These larvae are so similar to the one 

 previously described that a brief description is included here. 



Species A^ the smaller of the two, measures six mm. in length and 

 a half mm. in breadth. Its form, unlike the other species which is 

 greatly depressed, is almost cylindrical. In color the alcoholic speci- 

 men is uniformly dark brown, except the gills which are slightly 

 lighter, some gills being encircled near the middle by a single band 

 of black. They are arranged in supra- and infra-stigmatal series as 

 in Elophila ftdicalis and, as in that species, are not alike in number 

 on the two sides. Also unlike E. fulicalis the gills of both the supra- 

 and infra-stigmatal series are arranged in anterior and posterior 

 groups, but these groups may vary in number on the two sides of the 

 same individual or may be entirely wanting. The first thoracic seg- 

 ment bears no gills, the second and third thoracic segments bear 

 supra and unlike fulicalis, infra-stigmatal gills. This larva has a 

 group of five dorsal gills on the posterior border of the ninth ab- 

 dominal segment midway between the lateral line and the lateral 

 margin PI. Ill, fig. 10. 



The head in form is much more rounded than E. fulicalis. The 

 labrum is shown in PI. 2, fig. 7. Four setae on each side are broad- 



