NEW GALL MIDGES 1 19 



approximately four times its diameter. Palpi : First segment irregular, 

 the second narrowly oval, the third a little longer than the second, more 

 slender, the fourth about one-third longer than the second, greatly dilated. 

 Eyes black, coarsely granulate, narrowly approximate at the vertex ; 

 ocelli apparently present, three in number. Mesonotum shining brown- 

 ish black. Scutellum and postscutellum dark brown. Abdomen fuscous 

 orange, the dorsal sclerites of segments I to 5 reddish brown, the others 

 a little darker; venter yellowish salmon. Wings hyaline. Costa pale 

 straw, subcosta and the third vein approximate basally, the former uniting 

 with the anterior margin near the middle, the latter at the distal ninth ; 

 cross vein wanting -, the fourth vein obsolescent, forked ; the fifth vein 

 simple, slightly curved, joining the posterior margin at the distal fourth, 

 the sixth strongly curved near the middle. Halteres yellowish basally, 

 slaty brown apically. Coxae fuscous yellovvash, the legs a nearly uniform 

 fuscous straw ; claws simple, strongly curved, the pulvilli a little longer 

 them the claws. Ovipositor short, stout, the lobes triarticulate, the termi- 

 nal segment broadly oval and thickly setose. Type C. 1555. 



Lasioptera tibialis, new species. 



The unusually small midges were reared April 24, 1914, from astern 

 or branch gall on Pentstemon antirrhinoides? collected by Mr. E. P. 

 Van Duzee near La Jolia, California. The species runs in our key to 

 near L. allionice. Felt, from which it is easily separated by its smaller size, 

 more hairy wings, the reddish brown scutellum, and the peculiar mark- 

 ings of the tibiae. A specimen of the beautiful little Urellia mefarna 

 Walk., probably an inquiline, was also reared from this gall. 



Gall: Length, 1 .5 cm. ; diameter, 4 to 5 mm., unicellular, rather hard. 

 This is a subcylindric enlargement of the stem or branch and is traversed 

 by a simple median gallery. The coloring of the deformity varies from 

 a reddish brown to greenish and is not very different from that of the 

 normal stem. 



Larva: Length, 3 mm., rather slender, tapering at both extremities, 

 yellowish orange, the breastbone long, bidentate, and with the lateral 

 angles of the anterior portion expanded. 



Male : I^ength, 1 mm. Antennae short, sparsely haired, dark brown ; 

 1 6 segments, the fifth with a length one-fourth greater than its diameter ; 

 terminal segment suboval or subglobose. Palpi : First and second seg- 

 ments short, irregular, the third nearly twice the length of the second, 



