144 the canadian entomologist. 



Explanation of Plates vi and vil 

 Plate VI. 

 Fig. I. TrichotJu'ips anomocerus, sp. nov. — Female, x 117. 

 Fig. 2. Trichothrips aiiomocerus. — Apex of right antenna of female, 

 X514. 



Fig. 3. Trichothrips anomoceriis. — Tip of abdomen of female ; mem- 

 branous portions stippled ; x 117. 



Fig. 4. Trichothrips anomocerus. — Right fore leg of female, x 117. 



Plate VIL 

 Fig. I. Cryptothrips juîictus, sp. nov. — a^ head and prothorax of $ , 

 X 67 ; b, left antenna of 9 from Michigan, x 199 ; c, left antenna of ? 

 from Illinois, x 199. 



Fig. 2. Hoplothrips fiodicornis, Renter; Ç , head and pronotum; x 67. 



LASIOPTERYX M AN I HOT, N. SP. (DIPTERA). 



BY E. P. FELT, ALBANY, N. Y. 



The small, yellowish midges were reared from Cassava (Manihot 

 utilissima), July 15, 1911, by Mr. W. H. Patterson, of the Agricultural 

 School, St. Vincent, W.I. This species appears to be allied to Z. carpini 

 Felt, from which it is easily distinguished by the narrow wings. The 

 longer, stouter antennœ in both sexes serves to separate it from a more 

 closely allied undescribed form. 



Male. — Length, i mm. Antennae nearly as long as the body, thickly 

 haired, fuscous ; 13 segments, the fifth with a stem about y^ the length of 

 the basal enlargement, which latter has a length ^ greater than its 

 diameter and bears a thick whorl of long, stout setae ; terminal segment 

 produced, with a length thrice its diameter and tapering to a narrowly 

 rounded apex. Palpi yellowish. Mesonotum fuscous yellowish. Scutel- 

 lum, postscutellum and abdomen yellowish, the latter sparsely haired. 

 Wings subhyaline, broad, costa dark brown, the membrane rather thickly 

 clothed with linear scales. Haltères yellowish. Coxae and femora mostly 

 yellowish, the tibiae slightly darker, the tarsi fuscous yellowish ; claws very 

 long, slender, unidentate, the pulvilli rudimentary. Genitalia ; basal clasp 

 segment moderately stout ; terminal clasp segment long, stout. Other 

 organs indistinct. 



Female. — Length, i mm. Antennae extending to the base of the 

 abdomen, rather thickly haired, fuscous yellowish ; 13 subsessile segments, 

 the fifth with a length about yi greater than its diameter and with a thick 

 whorl of long, stout setae ; terminal segment reduced, narrowly rounded 

 apically. Palpi yellowish, the first segment subquadrate, the second 

 narrowly oval, the third as long as the second, the fourth y^ longer than 

 the third, somewhat dilated. Abdomen apparently lighter than in the 

 male ; ovipositor short, terminal lobes narrowly oval and sparsely setose. 

 Other characters nearly as in the male. 



