258 THE CANADIAN ENTOMOLOGIST 



Expanse 16 mm. 



From Clear Creek and Chimney Gulch, Golden, Colo. (Oslar). 



Holocentropus longus n. sp. (Figs. 65, 68). 



Palpi pale, dark on last joint; face dark, with black bristles 

 above; vertex black with white hair; antenna? yellowish, annulate 

 with brown; thorax with white hair; legs yellowish; wings brown, 

 irregularly spotted with white, four white marks on costal area 

 before stigma, spots between veins on margin, and many elsewhere, 

 often connected ; hyaline marks not distinct. The fore wings are 

 longer than usual, fork 5 with sides parallel for most of its length, 

 in type fork 1 is a mere rudiment at margin, but in another speci- 

 men ( 9 ) it is longer than pedicel, in this female there is a short 

 fork 1 in one hind wing. 



Expanse 20 mm. 



From Framingham, Mass., June (Frost), and Digby, Nova 

 Scotia (Russell), June. 



Polycentropus centralis n. sp. (Fig. 67). 



Palpi yellowish; antennae pale, annulate with dark; face brown, 

 vertex with yellow hair in middle, black by eyes, thorax with 

 golden hair, abdomen brown above, yellowish below; legs yellow. 

 Wings dark brown, rather densely spotted with patches of yellow 

 hair; anal and cubital veins more heavily black than others; hind 

 wings gray, blackish at tips; fork 1 about as long as pedicel, 

 venation otherwise like P. confusus. Size, rather smaller than 

 P. confusus, and lower male appendages of different shape. 



From St. Louis, Mo., June. 

 Polycentropus confusus Hagem (Fig. 70). 



This is common in Northern States; the male genitalia are 



figured. 



(To be continued.) 



BOOK REVIEWS. 



A Textbook of Medical Entomology. By Walter Scott Patton, 

 M.B. (Edin.), I. M.S. and Francis William Cragg, M.D. (Edin.), 

 T.M.S., London, Madras and Calcutta, 1913. 

 The science of medical entomology, although of very recent 



origin, has developed so rapidly within the past decade and the 



