214 Orthorrhapha brachycera. 



bright grey below. Head somewhat globular, but generally broader 

 than long, as broad as or slightly narrower than thorax, only slightly 

 arched behind; the lower part of the head may be more or less 

 elongated downwards. Occiput with bristles on the upper part. Eyes 

 somewhat large, round and somewhat prominent; they are well se- 

 parated in both sexes, sometimes the frons is slightly narrower in the 

 male than in the female; the distance between the eyes below the 

 antennæ is generally larger in female than in the male. ^ The facets 

 are of equal size. The eyes are short but densely hairy; the incision 

 in the inner eye-margin is generally small. The vertex is broad; 

 the three ocelli are placed on a prominent tubercle, which is situated 

 somewhat forwards on the vertex; there are two ocellar bristles, and 

 there may also be lateral bristles on the vertex. The antennæ are 



Fig. 88. Antenna of Cl. Zetterstedti. X 80. (The direction of the arista is not natural). 



inserted near to each other, somewhat high, always above the middle; 

 they are short, five-jointed, the two basal joints short, the first some- 

 what obconical, the second almost globular, the third a little longer, 

 somewhat onion-shaped and compressed, terminating with a long, 

 hairy arista, generally curved downwards, which consists of two joints, 

 the first short. Epistoma is broader or narrower, rather high on ac- 

 count of the somewhat high insertion of the antennæ; its lower mar- 

 gin may be straight, or incised in different ways. Jowls are distinctly 

 present, broader or narrower, sometimes very broad and descending 

 far below the eyes, and then the whole lower part of the head 

 is elongated. The mouth parts are somewhat curious; the oral cone 

 is very small, or no real cone is developed; clypeus is in some cases 

 distinctly present and more or less horse-shoe-shaped ; epistoma, or 

 this together with the jowls, is then more or less incised in the lower 

 margin, and the incision is occupied by the clypeus (Chamaedipsia, 

 Roeder ia, Eucelidia, Philolutra and Wiedematinia) ; in other cases 

 epistoma goes longer downwards without incision, and then the cly- 

 peus seems not to be separated, at most present as a small, elevated 

 keel. Proboscis is short and thick, generally only stretching out of the 



Zetterstedt says under his Brachysioma in the generic description: „Mas: ocuUs 

 infra antennas conniventibus", and under the s^&c\QsWesmaelii he repeats this, 

 but it is erroneous. 



