517. 

 RHAMPHOMYIA PENNATA. 



Order Diptera. Fam. Empidae. 



Type of the Genus, Rhamphomyia sulcata, Meig. 



Rhamphomyia Hoff., Macq., Curt. — Empis Fab., Lat., Fall. 



Antennce not longer than the head, inserted at the middle of the 

 face, contiguous at the base, porrected, pubescent, stout and 

 5-jointed ; 2 basal joints producing a few long bristles, the 1st 

 oblong, 2nd globose, 3rd long, ovate at the base, attenuated to 

 the apex, 4th joint minute cup-shaped, 5th longer, slender and 

 tapering to a i)oint (3). 



Tropin exserted vertically, generally longer than the head (2). 

 Labrum longer than the head, stout, horny hollow and acute 



Tongue as long as the labrum and resting in it, flat lanceolate 



and very acute (c). 



MaxillcE long, slender and acute, but considerably shorter than 



the tongue (e). Palpi much shorter, clavate and pilose (/). 



Lip as long as the labrum, very slender at the base, clavate, 



bilobed and pilose at the apex {g). 

 Head small and globose : eyes large and ovate, covering nearly the 

 rvhole side of the face (2): contiguous above in the male (2 (J), re- 

 mote in the female: ocelli Z on a tubercle behind the eyes in the male, 

 and on the croivn of the head in the female (2). Thorax considerably 

 larger than the head and globose : scutellum rounded. Abdomen 

 tapering, but clavate at the apex in the male, conical in the female, 

 the apex furnished tvith two compressed hairy lobes. Wings ample, 

 incumbent and parallel in repose, with a subtrapezate discoidal cell, 

 the 3rd longitudinal one not furcate at the apex: halteres rather 

 large and capitate. Legs long, especially the hinder pair, which are 

 also the stoutest : tibiae more or less clavate: tarsi 5-jointed, basal 

 joint frequently the stoutest in the hinder pair, especially in the males 

 (8 t) : claws and pulvilli distinct. 



Pennata Macq. — Curt. Guide, Gen. 1207. 5*. 



Female ochreous : antennae shorter than the head and black, 

 excepting the 2 basal joints which are bright ochreous ; head 

 and thorax gray, the latter with 3 brown stripes down the mid- 

 dle : abdomen generally with a dusky spot or two on the back, 

 the lobes black : wings pale yellowish brown, darkest at the 

 costa and tips, richly iridescent, the nervures brown : legs com- 

 pressed, with the hairs black, the 4 hinder thighs and tibiae 

 ciliated above and below with long black clavate scales ; tarsi 

 black, except at the base. 



In the Cabinets of Mr. Walker and the Author. 



