1898.] ENTOMOLOGICAL NFU'S. 63 



men more dilated, and also with a dorsal basal spot on ninth 

 segment, and the superior appendages have several crenuke on 

 the inferior apical third. 



Described from a single male taken Aug. 25, 1897 (by F. L. 

 Harvey), over Russell Stream, a tributary on the East Side of 

 the West Branch of the Penobscot River, two miles above North- 

 east Carry near the head of Moosehead Lake. 



25. Gomphus naevius Hagen (PI. v, figs. 2-5, 9, 10). 



$ (previously unknown). Length 34-37 mm.; abdomen 25-27 mm.; 

 hind wing 19.5-21.5 mm. Greenish yellow and black. 



Frons, clypeus and labrum greenish, with the sutures separating them 

 more or less black, the black extending in a narrow line nearly half way 

 across the centre of the labrum. Vertex and occiput black, the latter 

 with a small yellow spot behind, and its straight hind margin with long 

 black hairs. Eyes greenish. Apex of first joint of the antenna? on the 

 inside yellow. Rear of head black. 



Prothorax black with two minute yellow dots on the middle of the 

 dorsum and a narrow yellow line on the anterior border. 



Thoracic dorsum black, excepting a transverse anterior, and two isolated 

 ante-humeral stripes which are greenish yellow; the transverse anterior 

 stripe interrupted by the mid-dorsal carina; the first ante-humeral stripes 

 are oblong in form and divergent anteriorly. The second ante-humeral 

 stripe, when entire, narrowed in the middle; when broken, the upper half 

 is sometimes reduced to a small superior spot; to have this stripe entire 

 is the exception. Sides greenish yellow. Black bands on the humeral 

 and first and second lateral sutures. The metastigma black. The 

 underside of the thorax and the coxae yellowish green. 



Legs black. Interior median surface of the femora of the fore legs 

 greenish. 



Wings hyaline. Costa greenish yellow; pterostigma black, 3 mm. 

 long on the hind wing; ante-cubitals n, post-cubitals 8. 



Abdomen black, marked with yellow as follows : segment i with a 

 narrow mid-dorsal stripe, a transverse stripe on posterior end of dorsum 

 and lower half of side. Segment 2 with a mid-dorsal stripe, arrow-shaped, 

 with the point backwards, the auricles and a patch behind them next the 

 genitalia. Segment 3 with lateral proximal spots which ma\ be contin- 

 uous over the dorsum forming basal rings, or interrupted, leaving basal 

 dorsal spots. The dorsal markings may be obsolete, especially on 4-6. 

 Segment 10 unspotted. Suture between 8 and 9 yellow on dorsum. The 

 spot on side of 8 conspicuous, larger than on the other segments, extending 

 to the middle above and the whole length on the lower border. The 

 ventral edge of all the segments pale colored. Segments 3-7 slender, 

 widening to the apex of 8, which is 2 mm. broad, then narrowing to 10, 

 which is 1.5 mm. broad. 



