18. 

 EMPIS BOREALIS. 



Order Diptera. Fam. Empidaj Lat. 



Type of the Genus E. tessellata Fab. 



Empis Linn., Fab., Lat., Melg. Asilus Linn. 



AntenncB porrected^ 5-jointedj first joint cylindric, second ob- 



conic or turbinate i third long, subulate; fourth very small, cup- 



ghapedj fifth long, slender, attenuated. (3.) The antennae of 



£. borealis is also figured (3. a.), to show the great length of the 



third, and the shortness of the terminal joint. 



Labrum horny, hollow, bifid, dilated at its base. (1. b.) 



Tongue horny, linear, acute, as long as labrum. (I.e.) 



Mandibles none. 



MaxiZ/<^ attenuated, acute, shorter than labrum. (I.e.) Palpi 



erect, filiform, pilose, attached to the base of maxillae, not half 



their length. (1. f.) 



Mentum bent, slender, rather short. (I. h.) 



Lip siphon-formed, submembranaceous, very long, clavate, bi- 



lobed, ciliated. (1. g.) 



Proboscis often as long as the head and thorax, perpendicular or in 

 Jlected under the breast. (2.) Head small, globose ; eyes distant only 

 in the females, with 3 stemmati. Halleres 2. Abdomen of male 

 truncate and bilobed at apex ; of the female robust, attenuated, with 



2 appendages at the apex. Wings incumbent, parallel, with 4 mar- 

 ginal cells, including the small one near the apex, 2 submarginal, 



3 discoidal and A posterior marginal cells. Posterior legs the longest. 

 Tarsi 5-jointed. Pulvilli 2. (8. a fore-leg.) 



BoBEALis Linn. Syst. Nat. 2. 1003. I. Fab. Ent. Syst. v. 4. p. 403. n. \. 

 Male very dark gray, pilose. Eyes contiguous. Thorax with 

 4 black stripes. Body shining. Wings lanceolate, ciliated, pale 

 brown, transparent in the centre, slightly ferruginous at the 

 costa, with a brown spot towards the apex. Halteres yellow. 

 Legs black. Thighs more or less ferruginous, as well as tibiae 

 in last pair. Female : Eyes distant, marks upon thorax very di- 

 stinct. Wings large, broad, obtuse, semi-transparent, brown, 

 ferruginous at the costa and base. 



In the Cabinet of Mr. Vigors. 



This curious Insect, which has never been ascertained to be 

 a native ol' Great Britain, has been found in Ireland by James 

 Tardy, Esq. of Dublin : — for 'ipeciuion^, and the following ex- 



