308 THE CANADIAN ENTOMOLOGIST 



a Stem nearly % the length of the cylindric basal enlargement, 

 which latter has a length about twice its diam.eter; terminal seg- 

 ment produced, the basal enlargem.ent cylindric, with a length 

 more than three tim.es its diameter and apically a finger-like pro- 

 cess. Palpi : first segment subquadrate, with a length m.ore than 

 twice its diam.eter, the second twice the length of the first, the 

 third a little longer, somewhat dilated; the fourth a little longer and 

 mxre slender than the third. Mesonotum slaty brown, the sub- 

 m.edian lines indistinct. Scutellum yellowish, pcstscutellum fus- 

 cous yellowish. Abdom.en brownish red, the dorsal sclerites som.e- 

 what fuscous. Ovipositor reddish yellow. Halteres yellowish 

 transparent, fuscous subapically. Coxae pale yellowish, fem.ora 

 light straw, tibife and tarsi fuscous straw. Ovipositor stout, 

 nearly as long as the abdom.en, the terminal lobes lanceolate, 

 sparsely setose. Type, Cecid a2411. 



Described from a number of males and females taken together 

 and presumably specifically identical. 



A NEW SPECIES OF HELIOTHRIPS (THYSANOPTERA) 

 FROM MARYLAND AND ILLINOIS. 



BY j. DOUGLAS HOOD, 

 United States Biological Survey, Washington, D. C. 



The systematist's interest in the genus Heliothrips Haliday 

 is enhanced by the fact that it includes several of the best known 

 and mxst troublesome species of the order. HcEmorrhoidalis and 

 femoralis are cosm.opolitan greenhouse pests ; ruhrocinctus, a widely 

 distributed tropical species, injurious to cacao, has lately appeared 

 in Florida as an enemy of the mango and avocado ; fasciatus often 

 proves troublesome to beans and other crops in California ; 

 while the recently described phaseoU is an important bean pest in 

 southernm.ost Texas. 



In a recent paper on the genus,* Dr. Karny unites Dictyothrips 



and Parthenothrips with Heliothrips, recognizing them as subgenera 



only, and erects a fourth subgenus, Selenothrips, for a new species 



which he calls decolor and for ruhrocinctiis Giard. While admitting 



that Selenothrips is a well-founded subgenus, I can not follow Dr. 



Karny in his treatment of Dictyothrips and Parthenothrips. In the 



*Rcvision dcr Gattung Heliothrips Hali(la\-, Rnt. Rundsch., 2<S Jht;., no. 

 23, pp. 179-182, 5 figs.; 1911. 

 September, 1913 



