REPORT OF THE STATE ENTOMOLOGIST I913 I95 



Lasiopteryx arizonensis n. sp. 



The yellowish midge described below was reared April 21 and 

 24, 191 1 from a jar containing wild grape leaves with numerous 

 galls infested apparently by Phylloxera and collected August 15, 

 1910, by Dr R. E. Kunze at Prescott, Ariz. The very broad wings 

 serve to distinguish this species from its near allies. 



Male. Length .8 mm. Antennae extending to the fifth abdominal 

 segment, thickly haired, dark reddish brown ; probably 14 segments, 

 the fifth having a stem one-half the length of the cylindric basal en- 

 largement, which latter has a length twice its diameter; terminal 

 segment missing. Palpi; first segment small, irregularly subfusi- 

 form, the second a little longer, subrectangular, the third a little 

 shorter than the second, slightly swollen near the middle, the fourth 

 fully one-half longer than the third, dilated apically. Mesonotum 

 dark reddish brown, the submedian lines sparsely haired. Scutel- 

 lum yellowish, postscutellum yellowish brown. Abdomen mostly 

 fuscous yellowish, the dorsum of the segments sparsely clothed 

 with fuscous hairs; genitalia fuscous. Wings subhyaline, un- 

 usually broad, the length being less than one-half greater than the 

 diameter; costa thickly scaled. Halteres yellowish basally, fus- 

 cous apically. Coxae mostly pale yellowish ; femora basally yellow- 

 ish straw, slightly fuscous apically ; tibiae and tarsi mostly dark 

 brown or black and thickly scaled ; claw^s slender, strongly curved, 

 unidentate, the pulvilli nearly as long as the claws. Genitalia ; 

 basal clasp segment long, slender; terminal clasp segment slightly 

 swollen basally, long; dorsal plate long, broad, deeply and trian- 

 gularly emarginate ; ventral plate rather long, broad, subtruncate. 

 Halteres subtriangular, apically with a series of chitinized, digitate 

 processes. 



Female. Length .75 mm. Antennae hardly extending to the 

 base of the abdomen, thickly haired, light brown, yellowish basally ; 

 14 subsessile segments, the fifth cylindric, with a length about 

 twice its diameter : terminal segment slightly produced, with a 

 length two and one-half times its diameter, narrowly rounded apic- 

 ally. Palpi yellowish, the first segment irregularly subquadrate, 

 the second narrowly oval, with a length about twice its diameter, 

 the third as long as the second, slender, the fourth one-half 

 longer than the second. Face yellowish. Mesonotum light brown, 

 the submedian lines sparsely haired. Scutellum and postscutellum 

 light orange yellow. Abdomen sparsely haired, dark orange yellow. 

 Ovipositor short, the terminal lobes with a length one-quarter 

 greater than the diameter, broadly rounded. Type Cecid. a2o6^. 



Lasiopteryx manihot Felt 

 1912 Felt, E. P. Can. Ent., 44:144 



The small yellowish midges were reared from Cassava, Mani- 

 hot utilissima, July 15, 191 1, by W. H. Patterson, St Vin- 

 cent, A\\ L 



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