OP WASHINGTON. ' 125 



and he had seen the larva of Anatis i^-pundata attack and 

 feed upon a Chrysopa larva. Cocoons of the latter genus were 

 also found which had evidently been eaten into by some in 

 sect, and he suspected that this was also the work of Anatis. 



Mr. Howard said that at Toronto he had been bitten, to his 

 surprise, by the larva of Chrysopa, and had noted with con 

 siderable curiosity the peculiar action of the insect in pumping 

 up the blood. 



Mr. Marlatt presented a note in which he proposed the 

 specific name unicolor for a species of Monoctenus, the larvae of 

 which feed on the Red Cedar, Juniperus virginiana. This 

 Saw-fly had been described by him in the Transactions of the 

 Kansas Academy of Science, Vol. X, page 82, as M.juniperi^ 

 but this name had long since been applied to a European 

 species of the genus by Linnaeus. 



Mr. Banks presented the following paper : 



ON THALAMIA PARIETALIS HENTZ. 



BY NATHAN BANKS. 



The subject of this paper is a small spider, two millimeters 

 long, two specimens of which [ $ and $ ] I found in the cor 

 ners of my room while in Texas last September. 



Thalamia parietalis was described by Hentz in Proc. Bost. 

 Soc. Nat. Hist., in 1850, along with his other spiders. The 

 spider seemed so peculiar to him, that for it he erected the 

 genus Thalamia, and placed it between Mimetus and Scytodes, 

 two genera which he placed in the Theridiidcz . The spider .has 

 not been recorded since Hentz' s time. Hentz gave as the 

 characters of the genus Thalamia, which by the way he called 

 a subgenus, the following: "Eyes 8, subequal, in two rows 

 on each side of the front part of the cephalothorax, each row 

 strongly curved inward above and outward below ; maxillae 

 wider at base, inclined over the lip ; cheliceres very small, 

 feet 2. 3. 4. i." Hentz further states that the spider forms a 

 tubular dwelling of silk in the crevices of walls, protected 

 from the sun and rain. He believed it had some affinity with 

 Theridion. The species parietalis is characterized as follows : 

 c< Obscure ; cephalothorax pale with a bifurcated blackish line, 

 abdomen with several dusky small spots ; feet slender, 2. 3. 4. 

 i." Locality, South Alabama. 



