460 



Britton (W. E.) & Zappe (M. P.). The Imported Pine Sawfly : 

 Diprion {Lophyrus) simile, Hartig. — 17th Rept. Connecticut State 

 Entomologist for 1917, Conn. Agric. Expt. Sta.,New Haven, Bull, 

 no. 203, 1918, pp. 273-290, 4 plates. 



This paper is largely a compilation of various notes that have appeared 

 on the subject of Diprion (Lophyrus) simile, Hartig. [See this Review, 

 Ser. A, iii, p. 573, iv, pp. 242,286, and v, p. 217.] " There are two 

 generations in Connecticut and possibly a third in favourable seasons. 

 The larvae injure pine trees by feeding on the leaves, particularly 

 those of five-needled pines. Winter is passed in the pupal stage on 

 the twigs, and adults begin to emerge in the latter part of April. Eggs 

 are deposited in the needles of the previous season's growth. The 

 first generation of larvae feed during May and early June, those of 

 the second generation during August and September, and the latter 

 feed on the new growth, so that trees may be stripped in one season. 

 After 5 moults the larvae pupate. Eggs may be deposited partheno- 

 genetically and will hatch and develop normally. Nearly 50 per cent, 

 of the larvae are parasitised, the parasites including the Hjonenoptera, 

 Dibrachys nigrocyaneus, Nort., Monodontomerus dentipes, Boh., 

 Dibrachoides verditer, Nort., Delomerista sp.n., Cerambycobius sp. 

 (probably new), Eurytoma sp., Hemiteles utilis, Nort., and a Dipteron, 

 Exorista petiolata, Coq. Of these, the first three give fair promise of 

 becoming effective in checking the pest, the first-named being by far 

 the most abundant. Remedial measures include spraying the trees 

 with lead arsenate early in May and again in August, and destroying the 

 larvae and cocoons when found. 



Britton (W. E.) & Lowry (Q. S.). Outbreak of the Pink and Green 

 Potato Aphid. — 17th Rept. Connecticut Stale Entomologist for 1917, 

 Conn. Agric. Expt. Sta., New Haven, Bull. no. 203, 1918, pp. 290- 

 302, 2 plates, 1 fig. 



This paper records an outbreak of Macrosiphum solanifolii (pink and 

 green potato Aphid) that occurred in New Haven in July 1918. 

 Investigation and control were carried on on the same lines as in the 

 Ohio outbreak recently described [see this Review, Ser. A, vi, p. 455]. 



Zappe (M. P.). A Cockroach Pest of Greenhouses, Pycnoscelus 

 [Leucophaea) surinamensis, L. — 17th Rept. Connecticut State 

 Entomologist for 1917, Conn. Agric. Expt. Sta., New Haven, Bull, 

 no. 203, 1918, pp. 302-313, 4 plates. 



The cockroach, Pycnoscelus [Leucophaea) surinamensis, L., became 

 very numerous in greenhouses in the spring of 1917, causing considerable 

 damage by gnawing the bark from the stems of young rose plants. 

 WTien full-grown, the insects eat the leaves rather than the bark on 

 the stems. Much damage was done also to Easter hlies, young sprouts 

 from the bulbs as well as large plants being attacked. The bark of 

 Poinsettia stems was similarly eaten away. The insects hide during 

 the day in crevices in the benches, walls and floor and under boards 

 or other dark shelter ; at night they come out in large numbers to feed. 

 Eggs are frecjuently laid in the soil. Very little is known of the 

 reproduction of this species, but it would appear that the young are 

 either born alive or hatch from eggs within 24 hours. From the fact 



