(ORTHORRHAPHA BRACHYCERA.) 



(ORTHOGENYA.) 



Dolicliopodidae. 



Head about of the breadth of thorax or a little broader; it may 

 be higher than, or as high as broad, or on the contrary broader than 

 high ; it is as a rule somewhat narrowed below, and it is often a little 

 different in breadth in the two sexes; it is serniglobular, and generally 

 a little arched behind; sometimes it is shorter and flat behind, or on 

 the other hånd longer and globular or alniost so. The vertex is more 

 or less excavated, sometimes only slightly, or (as in Diapliorus) on 

 the contrary a little prominent. There is a generally prominent ocellar 

 tubercle with three ocelli. The frons is generally broad, and more or 

 less decreasing in breadth towards the antennæ; it is often a little 

 broader in the female than in the male, and in the former sex some- 

 times with the margins parallel. Only in the males of most species 

 of Diapliorus the eyes are touching above the antennæ, and the frons 

 thus rediiced to a small triangle. There are ocellar and postvertical 

 bristles, and generally also outer vertical bristles; the postvertical 

 bristles are as a rule smaller than the other bristles; they are placed 

 on the upper part of the occiput, sometimes in the middle and some- 

 what near to each other, but generally more distantly, and often they 

 are placed as if they were the uppermost postocular bristles. The 

 outer vertical bristles are sometimes wanting in the males, when this 

 sex has the vertex somewhat narrowed. There are generally a pair 

 or more of small hairs or bristles on the posterior side of the ocellar 

 tubercle; they are as a rule very small; (they may perhaps some- 

 times answer to inner vertical bristles). On the occiput, along the 

 hind margin of the eyes, is a row of bristles, the postocular bristles; 

 they form a single row above, and also often below, and they are 

 also present along the oral aperture behind, and liere either con- 

 tinuous, or interrupted in the middle, just above the aperture. Besides 

 there are generally some bristles on the lower part of occiput, and 

 not rarely the bristles only form a single row above, while the lower 



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