202 



PSYCHE. 



[February 1895. 



Pedicia obtuaa Osten Sacken, Western 

 Dipt., 205. — The description of this species 

 given by Osten Sacken was only a provi- 

 sional one, covering tiie salient features, 

 owing to the fact that he did not have the 

 specimen before him at the time, but 

 depended upon Mr. Hy Edwards, the owner 

 of the type, to write him the characters. As I 

 have a specimen, I record tlie full description. 



^. Head small, grayish, the antennae 

 yellow, palpi brown ; frontal tubercle distinct, 

 close to the antennae. Thorax grayish 

 sericeous, ground color yellow, a double 

 brown line on the dorsum and an abbreviated 

 one each side of it, reaching to the trans- 

 verse suture; on the pronotum a narrow 

 median black line; a black stripe from the 

 humerus to the base of the wing. Disk of 

 nietathorax and knobs of halters infuscated. 

 Abdomen light brown, darker along the 



median line; the horny genital appendages 

 are rather elongate, yellow, not infuscated. 

 Legs brownish yellow, tips of femora and 

 tibiae more infuscated, tarsi dark brown. 

 Wings hyaline and brown, with almost the 

 same pattern as in P. albivitta. The tip of 

 the wing is not bent back so far as in the 

 latter species. The brown color follows the 

 fifth vein to the margin, differing in this 

 respect from Mr. Edwards's speciinen. 

 Length, 28 mm ; of wing, 22 mm. 



Lake Union, Seattle, Washington, 

 the last of August. 



Tiie most important structural difler- 

 ence between this and P. albivitta is 

 in the male lamellae, which are more 

 than twice as large in the present 

 species. 



GALL OF EURYTOMA SP. ON THE CAT'S-CLAW THORN. 



BV C. 11. TYLER TOWNSEND, LAS CHUCKS, N. MKX. 



Specimens of a ver)' hard rounded 

 gall were foinid on branches and 

 twigs of the cat's-claw thorn (Acacia 

 sp.), which grows plentifully from 

 near base to part way up the Organ 

 Mts., at the north end of the range, 

 about three miles southeast of San 

 Augustine. These galls greatly re- 

 semble those of Rliodites. At the 

 date on which they were found, Nov. 

 26, 1892, they appeared to be empty, 

 the insects having mostly escaped 

 through numbers of small holes in 

 each gall. The galls were quite 

 plentiful. From those containing 

 exit holes, the following brief descrip- 

 tion is drawn. 



Gall. — Length (measured on twig), 10 

 to 19 mm. ; greatest width 8i to 16 mm. 



Oblong-rounded or suboval, very hard, 

 always formed on one side of the t<vig, 

 the other side of the twig even with the 

 surface of the gall and its bark left intact, 

 the bark of the rest of the twig or branch 

 being split by the growing of the gall and 

 adhering to its surface in imperfect strips, 

 being best preserved next the sides of twig. 

 Smaller specimens do not show this. Color 

 reddish brown, more or less grayish where 

 covered with bark and in smaller galls. 

 Bulged surface that is not covered by bark 

 finely roughened, sometimes more or less 

 split in process of swelling. 



Four galls. The small ones show 

 only from one to three holes each. 

 A larger gall shows about twenty 

 exit holes, and in addition numbers 

 of very minute holes through which 

 parasites of the gall flies must have 

 escaped. The minute holes are about 



