270 H. A. HAGEN. 



25. Ooinphus iiotalllS {fluvialis Walsh) raised. 



Selys Moiiogr. Gonijjhin. p. lo9. 



One male nympha skin from Detroit, Mich., raised by Mr. H. Gr. 

 Hubbard ; eight in alcohol half to full grown from Cairo, 111., July 26, 

 and Pekin, 111., October 9, by Prof A. S. Forbes; one female nympha 

 skin from Crampton, Mass., by F. Gr. Sanborn. Length 25 to 85 mm. 



Similar to G.plagiatus ; head cordate, strongly notched behind, angles globular ; 

 ocelli visible ; third joint of antennae twice tlie length of the two basal, cylindrical, 

 flattened above, bent up; fourth rudimentary, a small tubercle; mask oblong, 

 one-third longer than broad, channeled below on apical half; sides bent up; basal 

 third a little narrowed ; middle third of front border nearly straight, with a very 

 short comb of flat scales; palpus short, strong arcuate, with a strongly bent sharp 

 end hook and three quadrangular teeth just before it; movable hook long, bent, 

 sharp: wing cases covering half of 4th segment; abdomen nearly four times lon- 

 ger than broad, spindle shaped, as broad as the head, tapering, rounded above, 

 less below ; segments of equal length, 9th about one-third longer than 8th, conical ; 

 segment 10 very short, cylindrical, half as long as broad; lateral spines on 6 to 9, 

 the last one as long as 10th, triangular, blunt at tip; dorsal hooks none; a flat, 

 apical, triangular spine on 9th not exceeding the apical margin of the same seg- 

 ment; scars as usual ; genitals marked; appendages a little longer than last seg- 

 ment, triangular, not very sharp, laterals very little shorter; legs short, hind legs 

 longer, exceeding 6th segment ; third joint of tarsi about as long as the two basal, 

 first nearly as long as second ; antennae and legs very hairy. 



The specimen from Massachusetts is very similar, but somewhat stouter, 

 abdomen larger, less rounded, segment 9th hardly longer than 8th, its 

 apical dorsal spine only indicated ; lateral spine less than half the length 

 of 10th. If it should belong to another species, I do not know to which ; 

 at least the imago could not be smaller than G. flumalis. 



26. Guinplitis spiniceps (raised). 



Walsh Proc. Acad. N. Sei. Phila. 1862, p. SS9 ; Cabot, p. 5, No. 8, pi. ii, fig. 1. 

 Two nympha skins, male and female, taken in transformation, the 

 male half out of the skin, at Lawrence, Mass., July 4, 1867, by Mr. 

 F. Gr. Sanborn. Length -41 mm. 



Body very elongate, very narrow, little hairy; head large, cordate, as broad as 

 abdomen, about straight behind, angles blunt, with broad but low tubercles, third 

 joint of antennae twice as long as the two basal, very little larger on tip, bent, 

 somewhat flattened above ; fourth rudimentary, a short tubercle; mask large, a 

 little longer than broad, channeled below, sides bent up, a little narrowed at base, 

 middle third of front border straight, with a short comb of flat scales; palpus 

 short, strong, very arcuate, end hook strong, bent, sharp; just before it two strong 

 teeth; wing cases reaching nearly 4th segment; abdomen spindle shaped, slender, 

 more than four times longer than broad, very slowly tapering after 4th segment, 

 strongly convex above, a little less below ; segments of equal length, 9th twice the 

 length (6 mm.) of 8th, a little narrowed in middle, 10th very short (1 mm.) cy- 

 lindrical ; lateral spines on 6 to 9 short, not sharp, the last one-half as long as 

 10th, no dorsal hooks except a very short, flat, triangular, apical spine on 9th; 



