2O2 ENTOMOLOGICAL NEWS. [May, 'l6 



PROTAPLONYX n. g. 



The genus has the typical Lasioptera wing, the normal short 

 mouth-parts, 12 or 13 antennal segments, the third and fourth 

 not coalescent or at least separated by a distinct constriction ; 

 quadriarticulate palpi, heavy simple claws and an aciculate 

 ovipositor in the female. Type P. hagani n. sp. 



Protaplonyx hagani n. sp. 



The small flies described below were reared January 4, 1916, 

 in large numbers from small, folded, swollen leaflets of grease- 

 wood ( ? Sarcobatus vermiculatus} by Mr. Harold R. Hagan, 

 of the Agricultural Experiment Station, Logan, Utah, from 

 material collected October 25, 1915, on the Austin farm, 

 Wellington, Utah, in a locality near Price. 



Gall. The insects appear to prevent the unfolding and cause a swell- 

 ing of the leaflets, producing somewhat irregular, slightly distorted 

 growths about 12 mm. long and with a diameter of 1.5 mm. Appar- 

 ently one or more larvae may occur in each of the infested leaflets. 



Larva. Length 2.5 mm., moderately stout, reddish orange. Head 

 small, tapering to a narrowly rounded apex. Antennae bi-articulate, 

 the basal segment disk-like, broad, the terminal segment with a length 

 nearly four times its diameter and tapering to a narrowly rounded 

 apex; segmentation moderately distinct; skin coarsely shagreened ; 

 posterior extremity produced as a pair of sublateral, somewhat irregu- 

 lar, tapering, finger-like processes with a few short, coarse setae api- 

 cally. 



The small larva in the preparation has a length of .75 mm., is short, 

 stout, with both extremities broadly rounded and with no sign of the 

 conspicuous caudal appendages described above. The skin is coarsely 

 shagreened and unfortunately the head is concealed. 



Pupa. Length i mm., reddish brown, the wing cases extending to 

 the fifth abdominal segment, the leg-cases to the seventh abdominal 

 segment, the dorsum of the abdominal segments in the male at least, 

 thickly set with short, stout, triangular, chitinous spines. 



Male. Length .75 mm. Antennae extending to the base of the abdo- 

 men, sparsely haired, dark brown ; 12 segments, the third and fourth 

 nearly free, the fifth with a length one-fourth greater than its diam- 

 eter; the terminal segment, evidently composed of two, closely fused, 

 with a length nearly three times its diameter and tapering apically to a 

 broadly rounded apex. Palpi ; first segment indistinct, second with a 

 length about twice its diameter, slender, the third nearly as long as the 

 second, the fourth a little longer than the third, dilated and broadly 

 oval. 



