IO ENTOMOLOGICAL NEWS. [Jan., 'lO 



Two New Cecidomyiidae. 



By E. P. FELT, Albany, N. Y. 



Lasioptera tripsaci n. sp. 



This dark brown, white-banded species was reared at Piano, 

 Texas, August 12, 1909, from larvae occurring between the 

 leaf blades of Gama or Sesame grass, Tripsacum dactyloides, 

 and transmitted to this office by Prof. F. M. Webster under 

 the number of 6,011. This species is easily separated from al- 

 lied forms by the white margined abdominal segments, the 

 unicolcrous tarsi, the 18 antennal segments, the fifth with a 

 length three-quarters its diameter and the extended oviposi- 

 tor, the latter being nearly as long as the abdomen. 



Larva. Length 3 mm., pale yellowish orange. Head small, narrowly 

 rounded anteriorly. Antennae short, apparently uniarticulate. Breast- 

 bone bidentate, the teeth widely separated, small, the shaft weakly 

 chitinized. Skin coarsely shagreened. Posterior extremity produced 

 as a conspicuous pair of fleshy, conical pseudopods. 



Female. Length 2 mm. Antennae fuscous yellowish, lighter basally ; 

 1 8 segments, the 5th with a length barely three-quarters its diameter, 

 the terminal segment produced, evidently composed of two closely 

 fused. Palpi ; first segment broadly oval, the second a little longer, 

 narrowly oval, the third as long as the second, more slender, the 

 fourth a little longer and more slender than the third. Mesonotum 

 dark yellowish brown. Scutellum fuscous yellowish, postscutellum yel- 

 lowish. Abdomen dark brown, the segments narrowly margined pos- 

 teriorly and laterally, venter concolorous ; ovipositor yellowish. 

 Wings hyaline, the third vein uniting with costa at the basal half. 

 Halteres yellowish. Coxae fuscous yellowish, femora lighter, tibiae 

 lighter than the coxae, tarsi pale straw, the distal segments fuscous ; 

 claws stout, evenly curved, the pulvilli a little shorter than the claws. 

 Ovipositor nearly as long as the abdomen, stout, the terminal lobes 

 with a length three times the diameter, tapering, thickly setose, minor 

 lobes long, slender. 



Type Cecid. a2oi3, N. Y. State Museum. 



Cecidomyia opuntiae n. sp. 



This species was reared during June, July and August. 

 1909, from discolored areas accompanied by more or less do- 

 cay, at the base of spines on Opuntia leaves received from 



