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
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