140 



Weiss (H. B.). Some unusual Orchid Insects. (Hem., Lep., Dip., Col.). 

 Entom. Neioo, Philadelj)hia,xx-vm, no. 1, January 1917, pp. 24-29. 



In New Jersey greenhouses the following have been found attacking 

 various orchids, having in all probability been introduced from Central 

 and South America : — Ehynchota : Tenthecoris hicolor, Scott ; Lepidop- 

 tera : Castnia therajpon, Koll. ; Diptera : Parallelodiplosis caUleyae, 

 Moll. ; Coleoptera : Eucacto'phagus grapkipterus, Champ. ; AcytJiopeus 

 (Baridius) orchivora, Blackb. ; DiorymeUus laevimargo, Champ. ; Cholus 

 cattleyae, Champ. ; and Diaxcnes dendrobii, Gahan. 



Ripley (L. B.). Notes on the Feeding Habits of Adult Chrysopidae 



(Neur.).- — Entom. News, Philadelphia, xxviii, no. 1, January 1917, 

 pp. 35-37. 



The author's experiments have proved the fallacy of the generally 

 accepted statement that adult Chrysopids do not feed. When large 

 scarlet Aphids, taken from the stems of Rudbeckia Icmniata, were placed 

 in a cage containing C. oculata, they were vigorously attacked and 

 devoured by the Chrysopids, which also drank from drops of water. 

 Unfed females kept in a cage were observed to extract eggs from their 

 own abdomens with their mandibles and devour them rapidly, one after 

 another. This method is apparently resorted to only under the 

 stimulus of hunger and the rate at which eggs are available for extraction 

 is not sufficient for their entire nutriment. After a few days without 

 food, females die of starvation with many eggs in the abdomen, 

 whereas fed females lay all, or nearly all their eggs. 



LuGiNBiLL (P.) & Urbahns (T. D.). The Spike-horned Leaf-miner, an 

 Enemy of Grains and Grasses. — U.S. Dept. Agric, Washington, 

 D.C., Bull no. 432, 13th December 1916, 20 pp. 2 plates, 1 fig. 



The Agromyzid, Cerodonta dorsalis, Lw., breeds in a large variety of 

 food-plants of the order Graminaceae. The synonymy and history, 

 with a full description of the insect, are given. The female punctures 

 the leaves of plants, feeding on the sap that escapes from the wound, 

 and depositing eggs in the holes thus made. The greatest injury is 

 done by the larvae, which mine the leaves and stems of young plants. 

 Pupation takes place in the mines, whence the adult escapes through 

 the dry tissue around the pupal case. The species is active throughout 

 the year, fresh broods constantly appearing and overlapping previous 

 generations ; rearing experiments have disclosed at least eight 

 generations in a year. There are many natural enemies of this leaf- 

 miner, which are probably the cause of the almost total disappearance 

 of the pest during midsummer in some localities. These include : — 

 The Hymenopterous parasites, Cirrospilus jlavoviridis, Cwfd. ; Cyrto- 

 gaster occidentalis, Ashm. ; Diaulinus websteri, Cwfd. ; Diaulinopsis 

 eallichroma, Cwfd. ; Polycystus foersteri, Cwfd. ; a new species of 

 Dacnusa ; Chrysocharis parksi, Cwfd. ; Opius dimidiatus, Ashm. ; 

 and 0. aridus, Gahan. Many of these are also parasitic on various 

 species of Agromyza, especially A. pusilla. Preventive measures 

 suggested are summer fallowing to destroy puparia remaining in dry 



