39O ENTOMOLOGICAL NEWS [Nov., 'l2 



The known genera belonging to the Neriinae may be sep- 

 arated as follows: 



1 Arista dorsal ; fore coxae situated nearer middle pair than to the 



head Nothybus Rond. 



Arista terminal; fore coxae situated about equidistant from head 

 and middle pair 2 



2 First antennal joint many times longer than second and third 



together Macrotoma Laporte 



First joint not longer. 



Third antennal joint truncate apically; arista bare 



Nerius Fabr. 



Third antennal joint conical; arista apparently much thicken- 

 ed basally Telostylus Bigot 



Longina Wied. from Brazil may be synonymous with Mac- 

 rotoma, as suggested by Osten Sacken (i) but comparison of 

 specimens should be made to substantiate this. 



Telostylus vittatus n. sp. (Plate XIX, Figures 1-2). 



Opake brown : Front yellow with narrow orbits and vertical angles 

 black, somewhat shining ; ocellar region reddish ; frontal orbits a lit- 

 tle projecting and polished black anteriorly; calli at base of antennae 

 polished black, separated from orbit below by a velvety black spot. 

 Face and cheeks pale yellow, orbits narrowly silvery. Occiput yellow, 

 with upper angle and a horizontal stripe at lower orbit, velvety black. 

 Palpi and proboscis pale yellow. First joint of antennae pale yellow; 

 second and third brown ; style snow white. 



Thorax brownish ; mesonotum darker with a broad median pale 

 vitta ; a notopleural stripe and pectus pale yellow ; scutellum pale yel- 

 low, with lateral margins broadly brown or black. Halteres pale yel- 

 low. Abdomen brownish, with bases and apices medianly of 2-4 seg- 

 ments more or less pale; venter pale. Legs yellow, with tarsi brown 

 (posterior pair wanting). Wings brownish, more intense towards 

 costa. Auxiliary vein complete ending near apex of first, the latter 

 short ending much before middle of wing; second vein very long, so 

 that second costal section (between ends of first and second veins) 

 about four times length of third section ; veins 2 and 3 parallel ; fourth 

 gently curving towards third; first posterior cell open; basal cells 

 complete; anterior cross-vein near middle of discal cell; anal cell ob- 

 tuse. Length (less antennae and ovipositor), 9 mm. 



Type Locality. Bartica, British Guiana, S. A. 

 Type. 9 In the collection at the Academy of Natural 

 Sciences of Philadelphia, No. 5251. 

 (l) Berl. Ent. Zeit., xxvi, 200, 1882. 



