NORTH AMERICAN NEUROPTERA. 261 



11. Gomplius viilgati!«siiiius (rnised). 



Selys Monogr. Gomjihin. p. 128, Cabot p. 3, pi. 1, fig. 1. 

 Many nympha skins of both sexes from Prussia, Hanover, Bavaria, 

 Enoland and two nymphae in alcohol from Bavaria and Austria raised 

 by Bosenhauer and by F. Brauer. Length 31 mm. 



Body stout, not much hairy; head cordate, notched behind, angles rounded, 

 third joint of antennse nearly twice as long as both basals, a little dilated, bent up 

 at tip; fourth rudimentary; a short tubercle; mask quadrangular, channeled 

 below, as long as broad, a little narrowed at base, middle third of front border 

 straight, with a comb of flat scales; palpus short, arcuated, basal half finely den- 

 ticulated, end hook stout, sharp; movable hook long, sharp, bent; wing cases 

 reaching nearly 4th segment ; abdomen three times longer than broad, flattened, 

 lancet shaped, tapering, after fith segment decreasing; segments of equal length, 

 the 9th a little longer than 8th; the 10th one-third of the 9th, cylindrical; lateral 

 spines on segments 6 to 9 ; no dorsal hooks; apical margin of 9th segment pro- 

 duced in middle in a very short and faint triangular tooth, which is wanting 

 sometimes; a faint impressed median line on 5 to 8; scars as usual; genitals 

 marked ; appendages a little longer than last segment, pyramidal, sharp, laterals 

 shorter; legs long, not very strong, posteriors reaching nearly 9th segment: third 

 joint of posterior tarsi about as long as the two basals. 



12. Ooni)»liii«4 spec. 



One nympha in alcohol from Illinois, Prof. S. A. Forbes, and a very 

 young one from Mackinaw Creek, Woodwood County, Illinois, Aug. 20, 

 1S79. Length 27 mm. ; breadth 7 mm. 



Body lancet shaped, flat; an tenure, legs and side margins of abdomen very vil- 

 lous; head cordate, flat; ocelli visible; occiput short, notched in middle, with a 

 triangular short lobe on each side of the notch ; hind angles rounded, witli several 

 stripes; antennae short, third joint one and a half longer than the basals, curvated ; 

 fourth a short pyramidal tubercle; mask oblong, one-third longer than broad, a 

 little narrowed at the base; middle third of front border very slightly rounded; 

 palpus nearly straight, tip rounded, end hook not longer than the teeth, dentated 

 to base; movable hook long, strong, wing cases covering 2d segment; abdomen a 

 little more than twice longer as broad, only the last segments sloping; segments 

 of equal length, 10th one-third of 9th; lateral spines on 6 to 9 long, flat, trian- 

 gular, those of 9th as long as 10th segment; side margins of 8 and 9 serrated ; no 

 dorsal hooks, segments .3 to 7 divided above, a triangular short spine on middle of 

 apical border of 8 and 9; appendages little longer than last segment, pyramidal, 

 pointed, the median shorter thnii the inferiors; the laterals one-third shorter than 

 inferiors; legs strictly burrowing legs, the hind ones reaching 2d segment; the 

 wing cases cover only 2d segment. 



The smaller nympha, 12 mm. long, is exactly alike, only the wing 

 cases very small. Should they belong to G. amnicola ? This species is 

 similar to Ophiogomphus by the front border of mask very slightly 

 rounded and the palpus nearly without end hook, but the shape of the 

 abdomen and the divided median dorsal segment by an impressed median 

 line are similar to G. vulgatissimus The segments 8th to 9th serrated 

 on lateral margin. 



