918 Charles Paul Alexander 



on dorsal face of eighth segment, a close quadrangle of four rounded tubercles, placed on 

 a slight elevation. Female cauda with tergal acidothecae elongate, subacute at tips; sternal 

 valves short, blunt; quadrangle of tubercles on dorsum of eighth segment more distinct 

 than in the male. 



Nepionotypc. — Ithaca, New York, May 14, 1917. 

 Neanotype. — Ithaca, June 5, 1917. 



Paratypes. — Larvae and pupae in large numbers from type locality, May 14 to June 5, 

 1917. 



Erioptera chlorophylla O. S. 



1859 Erioptera chlorophylla 0. S. Proc. Acad. Nat. Sci. Phila., p. 226. 



Erioptera chlorophylla is conspicuous by its pale green color in the 

 larval, pupal, and adult stages. It is a common and widely distributed 

 species thruout eastern North America. Several larvae were found in 

 organic mud at Orono, Maine, on June 13, 1913, one of which pupated 

 on the 21st. When the insect is dropped into boiling water, the green 

 color immediately disappears. The associates of this species are discussed 

 under the account of Ptychoptera rujocincta (page 775). 



Larva. — Length, 9-10 mm. 



Diameter, 0.7-0.75 mm. 



Color uniformly pale green, fading to a pale yellow after death. 



Form moderately elongated, last segment of body elongate, gradually narrowed to bluntly 

 rounded apex. Body clothed with numerous appressed hairs. Spiracular disk somewhat 

 as in E. megophthalma but even more reduced, disk usually entirely closed, lateral lobes 

 on either side capable of close approximation, tracheae before the opening into spiracles 

 very large. 



Head capsule (Plate LXVIII, 364) of the Molophilus type, but longer and slenderer; the 

 two dorsal bars of each side very delicate, the ventral bars broader and flattened. Mental 

 plates (Plate LXVIII, 365 and 366) slender; anterior end of each ventral bar widely 

 expanded and provided with several teeth; these teeth varying in number, in some speci- 

 mens there being only five, in others eight, teeth to each plate; in the latter case the third 

 from either side is larger, with two smaller teeth between. Hypopharynx about as in 

 Molophilus. Antenna (Plate LXVIII, 367) large, basal segment stout, cylindrical; apical 

 papilla elongate-oval, with apex bluntly rounded and surface weakly sculptured; laterad of 

 this papilla a tiny cylindrical hyaline peg. Mandible (Plate LXVIII, 368) rather large; 

 cutting edge with about four slender teeth, the second from base the smallest; dorsal face 

 of mandible with a blunt subapical tooth and an oblique comb of about six stout setae or 

 chitinized teeth. Maxilla similar to that of Molophilus, but the hairy vestiture longer and 

 coarser. 



Pupa. — Length, 8.8-9 mm. 



Width, d.-s., 1.2 mm. 

 Depth, d.-v., 1.2 mm. 



