400 



Cobb (N. A.). Telradonema 'plicans, nov. gen. et spec, representing a 

 new Family, Tetradonematidae, as now found parasitic in Larvae 

 of the Midge-insect, Sciara coprophila, Lintner. — Jl. Parasitology, 

 Urhana, III., v, no. 4, June 1919, pp. 176-185, 8 figs. 



The Nematode, Tetradonema jMcans, gen. et sp. n., here described, 

 was found parasitic in the larvae of Sciara coprophila, Lint., as many 

 as 6 to 12 parasites occupying the body of the host. The mature 

 females contain thousands of eggs and it is believed that at least one 

 moult takes place after the parasites enter the host. 



HuNGERFORD (H. B.). Biological Notes on Tetradonema plicans, Cobb, 

 a Nematode Parasite of Sciara c9pro2)hila,L\ntnev. — Jl.Parasitology, 

 Urbami, III, v, no. 4, June 1919, pp. 186-192, 1 plate, 2 figs. 



So far Sciara coprophila. Lint., is the only known host of Tetra- 

 donema plicans, Cobb, and any number from 2 to 20 of these parasitic 

 Nematodes may be found in a single host. Both sexes are present, 

 the males slightly predominating. The worms are usually found in 

 the larvae, causing their death and disintegration, but if owing to 

 sUght or late infestation the larvae should pupate, the fly may emerge, 

 but the reproductive organs are replaced by numerous parasites. 

 These parasites may be distributed by means of migration of infested 

 larvae or through infested flies or the eggs exposed after the dis- 

 integration of the dead larva may be eaten by other larvae or carried 

 away by the air or water. 



The life-cycle from egg to maturity requires about 3 weeks and 

 takes place entirely in the body of the host. The eggs, of which each 

 female contains thousands, hatch within 24 hours if from young 

 females ; from older ones they may hatch in a few minutes. Normally 

 these eggs are not expelled until the death of the female. 



Knight (H. H.). Notes on Species of Miridae inhabiting Ash Trees 

 (Fraxinus) with the Description of a new Species (Hemip.). — 



Bull. Brooklyn Entom. Soc, BrooJdyn, N.Y., xii, no. 4, October 

 1917, pp. 80-82. [Received 21st July 1919.] 



These notes have been coUected during three seasons' work on the 

 Capsid bugs occurring in New York. AU the species dealt with are 

 confined to ash trees, so far as can be determined. Tropidosteptes 

 cardinalis, Uhler, was found breeding only on white ash (Fraxinus 

 armricana), chiefly on the tender and succulent growth. The adults 

 soon leave the place where they were reared and scatter to more 

 favourable growth for oviposition. Neohorus canadensis, Van Duzee, 

 was taken on F. americana in company with T. cardinalis and 

 N. tricolor, the life-cycle corresponding very closely with that of 

 T. cardinalis. N. geminus, Say, may prove to be only a variety of 

 N. atnoenus with which it occurs on F. americana, but is found only 

 during June and early July. N. amoenus, Reut., is most abundant 

 on F. americana and F. pemisylvanica and occurs rarely on F. nigra. 

 There are two generations, the first adults maturing about 20th June 

 and the insects continuing on the trees until frost occurs, or about the 

 middle of September. N. palmeri, Reut., has been regarded as a 

 variety of N. amoenus but is undoubtedly a good species. The author 

 has found it only on black ash {F. nigra). 



