1875.] ^^^'^ 



rcet, and slightly shorter than the second, beneath about its middle is a solitary rather 

 long bristly-looking hair, thicker in the middle than at its base or tip, generally 

 directed slightly backwards (i. e., towai-ds the base of the tarsus), and witli the 

 appearance of simply hanging on, the other bristles are slightly more developed than 

 usual, especially one or two. Wings rather greyish-hyaline, third and fourth veins 

 only slightly approximating. 



? . Face broad, greenish with pale tomentum, frons brilliant purple in the 

 middle, steel-blue at the sides ; alula? black-haired ; cilia of the lower orbit with a 

 tendency to form a beard ; antennae short, rounded ; belly pale haired ; legs paler, 

 front coxfc and base of femora considerably darkened, hind trochanters blackish, hind 

 femora slightly infuscated at the tip ; hind tibite shorter and tliinner than in the 

 male, altogether pale, with rather numerous small bristles, even base of tarsi pale. 



S. cediciiemus is therefore easily distinguished from S. tarsatus 

 hx the absence of the conspicuously dilated tibi;c and tarsi ; fi-om 

 pumilus by the absence of the bristles at the base of the anterior 

 femora, and by the, simple anterior tarsi ; from Zellcri by the simple 

 front tarsi ; from deniiculatns by the unarmed middle femora ; from 

 Synarthrus monilis by the simj)le middle tarsi ; and from pallij^es by 

 its dilated hind tUnce and different armature of the basal joint of the 

 hind tarsi. The first and only description of S. cedicnemus is of the 

 male only, in Loew's Neue Beitrage, ri, p. 15 (1859), and in this are 

 some serious divergences from my description ; I fancy, however, they 

 occur in Loew's description from insufficiency of material to describe 

 from. In the first place, he calls the species a Sijnarthrus ; he, however, 

 admits himself doubtful on the point, and I am quite sure of the presence 

 of bristles on the upper-side of the first joint of the antenna) in my 

 specimens; he describes all the legs as darker, but scarcely more so 

 than in the darkest of my specimens ; and he speaks of the basal joint 

 of the hind tarsi as"subtu8 setulis duabus divergentibus armatus." 

 At first, I was almost inclined to think the last point conclusive against 

 the identity of the species, but I now think Loew has unduly rated 

 one of the more developed bristles beneath the basal joijit of the tarsi ; 

 ho also slightly differs in describing the bristles on the middle tibiaj, 

 besides other minor differences. lie gives no locality for *S^. cedicnemus, 

 but leaves Germany to bo understood. I expect it is not rare in 

 Scotland, as each of my visits there has produced it. 



SYXAnxnurs moxius, Wlk. — I have cauglit this little-known 

 species ratlier freely at Lyndhurst and Eiiigwood about the end of 

 June. The male lias the face white, the front femora dusky above, 

 the front tibiio with a row of small spines all the way down, the basal 

 joint of the front tarsi pale, dark and bristly at the tip, the other 

 joints short and bristly ; middle tarsi with the three basal joints pale. 



