72 NEMATUS SCOTICTJS. 



Wings hyaline, stigma white, or livid testaceous ; first 

 transverse cubital nervure present. Saw short, thick, 

 with coarse serrations, rarely much projecting ; the claivs 

 have generally a subapical tooth. 



The distinctly punctured thorax, and especially its 

 sides, readily distinguishes this group from others of 

 similar coloration, e.g. from placidus and Thomsoni; 

 the latter also differing in its emarginated clypeus, and 

 the former has the antennae much longer and thinner. 



The species are northern forms, occurring mostly on 

 mountain tracts some on our highest mountain tops 

 or in pine forests. 



Synopsis of Species. 



1 (2) Legs clear white except the coxse and hind tarsi. Leucopodius. 



2 (1) Legs with the femora black. 



3 (4) Mesonotum smooth, shining, unpunctured; antennse shorter 



than abdomen, brownish beneath. Scoticus. 



4 (3) Mesonotum punctured, opaque, or semi-opaque; antennse 



black. 



5 (6) Frontal area distinct, third cubital cellule considerably dilated 



at the apex, stigma fuscous. Mollis. 



6 (5) Frontal suture indistinct ; third cubital cellule scarcely dilated 



at apex. 



7 (8) Stigma dark fuscous ; antennse as long as the body in $ . 



Fraternus. 



8 (7) Stigma testaceous ; antennse not longer than body. 



9 (10) Antennae as long as the thorax and abdomen in $ , as long as 



the body in $ t clypeus white. Breadalbanensis. 



10 (9) Antennse not much longer than abdomen in $ and ? ; clypeus 



black. 



11 (12) Labrum white, spurs half of the length of metatarsus ; wings 



not much longer than body. Astutus. 



12 (11) Labrum black; spurs one-third of length of metatarsus ; wings 



longer than body. Lativentris. 



15. NEMATUS SCOTICUS. 

 PL XVI, fig. 6, Saw. 



Nematus scoticus, Cam., Trans. Ent. Soc., 1881, 563. 



Black; head and thorax covered with close pubescence, which is 

 especially long on the face ; labruni, legs, and apex of abdomen, dull 

 testaceous; mandibles brownish, palpi, dark testaceous; the greater 

 part of coxse, a line on the under side of anterior femora, one above and 



