iflii.] 03 



yellow at apex ; the intermediate and hind-tibiae are yellow at knees, but only 

 slightly tinged with yellowish-brown at apices ; and the rows of short, stout 

 spines so conspicuous in the hind-tibiae of P. coriaceus are apparently obsolete 

 in this sjjecies. The wings are broad and lightly shaded with brown to the 

 apical third. 



The prothorax is strongly transverse, only two-thirds as long as the head 

 and one-half as long as broad ; the bristles are short and knobbed, the pair at 

 posterior angles being the longest ; and the spines on the fore-coxae are short 

 and stout. The tube is five-sixths as long as the head and about three and 

 one-half times as long as broad at basal third, thus ))eing slightly shorter and 

 stouter than in P. coriaceus. The rather long lateral abdominal bristles seen in 

 P. coriaceus are replaced by quite short ones in the present species. 



Habitat : Norway, oue female taken by beating lime trees at 

 Bygdo, near Cliristiauia, June 27tli, 1909, together with Dendrothrips 

 tilise, Uzel, numerous examples of an apparently new species of JEoJo- 

 thrips and larva3, Cephalotlirlps monilicornis (Reut.), and Cryptotlirips 

 major, sp. n. 



Easily recognised by the form of antennae, smoother cheeks, the 

 sliorter and more transverse prothorax, with shorter and more 

 noticeably clubbed setae, and the shorter abdominal bristles, which 

 are also differently arranged. 



Penshaw Lodge, 



Penshaw, Co. Durham : 

 • November 7th, 1910. 



ON THE OCCUREENCE IN NOETH AMEEICA OF THE EUEOPEAN 

 ERISTALIS (ESTRACEUS, L. 



BY ERNEST E. AUSTEN. 



More than sixty years ago, under the name SyrpJms cestriformis, 

 the species mentioned in the title of this note was re-described by 

 Walker* from a single female collected by Mr. Barnston at Martin's 

 Palls, Albany Eiver, Ontario, Canada, about the year 1843. Since 

 then the insect appears never to have been met with again in North 

 America, and its true designation has remained entirely unsuspected. 

 Osten Sacken, who examined Walker's type in the British Museum, 

 pointed out that it is " a rather peculiar Eristalis,"f and Williston,J 

 in his " Synopsis," merely reproduced Walker's original description 

 and Osten Sacken' s note without further comment. 



* F Walker, List of the Snecimens of Dipterous Insects in the Collection of the British 

 Museum. Part III, p. .i73 (184y). 



t C. R. Osten Sacken, Catalogue of the described Diptera of North America, p. 249, note 

 227 (1878). 



t S. W. WilUston, Synopsis of the North American Syrphid:o (Bulletin of the United States 

 National Museum, No. 31), pp. 170, 177 (IbSti). 



