200 



tent aud opened. Up to the time of writing sixty specimens of Les- 

 topbouus had issued under the tent. In the case of living plants were 

 found living Chrysopa adults and two species of Oocciuellid larvae^ also 

 many eggs and cocoons of Chrysopa. The adults of Lestophonus will 

 doubtless continue to issue, and we hav^e every reason to hope that they 

 will oviposit in the Iceryas upon the tree under the tent. Two Oocci- 

 uellid larvae were found crawling outside of the case from which they 

 had emerged through cracks in the putty. When transferred to the 

 orange tree they attacked the first Icerya they met. 



December 6, 1836. — An amendment of the constitntion, relating to the dues of the 

 various classes of members was discussed and adopted. Mr. S. Lowell Elliott was 

 elected a corresponding member of the Society. 



Dr. Marx made a communication on the structure of Hypochilus, a form showing 

 intermediate characters between the Tetrapneumones and Dipneumones. He showed 

 in what features it related to each of these groups, and also that in its nest making 

 habits it combined the characters of both Territellarice and Tiibitellarice. He also 

 made some remarks on the characters of the Dysderidce, Filistafidoe, and Ciniflonidce, 

 the latter a family which, he deems unnecessary, although recognized by Emerton. 



Prof. Riley, commenting on this jjaper, thinks the present bases of division, although 

 apparently disturbed by such forms as that discovered by Dr. Marx, may yet be sys- 

 tematically useful. He also urged upon Dr. Marx the importance of a stndy of our 

 Thei'apliosidce. Dr. Marx replied that in this family nothing could be done at pres- 

 ent, since the classification now in use was not based upon a study of our fauna, and 

 the characters used weie totally inapplicable. 



Mr. Howard remarked that he had recently read in the Tr. New Zealand Inst, for 

 1869, an account of the latipo, or poisonous spider of New Zealand, which appears 

 to be a species of Latrodectes. This is found on the sea-beach in the sedges, and was 

 not feared by the natives at a distance of half a stone's throw from the water. 



Mr. Ashmead said that he had seen a peach orchard defoliated by a spider. He 

 states positively that he has seen the senders bite pieces out of the leaves, but does 

 not say that he saw them afterward chew the bitten pieces. 



Prof. Riley made a communication upon the larvae of Leptinus and Leptinillus, show- 

 ing their relationship to that of Plafypsyllus. Larvae and imagosof the former had. 

 been found around AVashington, in nests of Graphops, and larvae and imagos of the 

 latter had been found upon the beaver in California. No pupae of either had been 

 found. 



Prof. Riley also made a communication on the habits of Tlialessa, which is proved 

 an external parasite on Tremex. He also gave an account of the egor and of the 

 structure of the ovipositor. He thinks the statement of Messrs. Lintner and Wood- 

 ward tbat ThaJessa also oviposits in the larva of Datana ministra was based upon an 

 error of observation, Heteropelma datancs, n. sp., having probably been mistaken for 

 ThaUssa. 



Mr. Schwarz exhibited a Telamona having a globular sac projecting equally above 

 and below the surfaces of the carapace. He supposes this sac to be formed by a 

 parasite in a manner similar to that in which Gonatopus forms a sac on certain 

 Bhyncliota. The Society then adjourned. 



J. B. Smith, 

 Becording Secretary. 



