Mar.4. i9i8 WeevUs Affecting Potatocs 603 



The pronotum is simple, undivided; the mesonotum and metanotum are composed 

 of praescutum and scutoscutellum. The first six abdominal sclerites are composed 

 of a spindle-shaped praescutum, a transverse scutum terminated by the spiracles, a 

 spindle-shaped scutellum, and a transverse postscutellum very greatly narrowed on 

 the dorsum. The praescutum has a few hairs. The scutellum has a row of hairs. 

 Just above each spiracle is a tiny hair. On each epipleural lobe beneath the spiracles 

 there is one hair. There are eight abdominal spiracles and one on the mesothorax. 

 The seventh and eighth segments are more crowded than the preceding. The ninth 

 and tenth are small and reduced. 



Pupa (PI. 30). — Length 10 mm., white. The most interesting features of this pupa 

 are the rudimentary wing pads seen only when the elytra are spread. The elytral pads 

 are not as large as often found in Aveevil pupae. The antennae are not geniculate. 

 The beak is short. There are five pairs of hairs located on the head and beak as 

 illustrated. On the thorax, which is subquadrate with truncate angles, there are 

 setigerous tubercles as follows: Four on anterior margin, two antemedian and two 

 postmedian on the disc, two pairs of antemedian and two pairs of postmedian on lateral 

 margin. Mesonotum and mettootum with one pair of setae each. The- first abdominal 

 segment has two pairs of setse, and the remaining segments have a long line of setigerous 

 tubercles. Each femur has two apical hairs, and a few ventral hairs are found as 

 illustrated. It is interesting to note that the processes of the ninth segment are acute 

 but reduced almost to the size of the tubercles. The tenth segment is ventral to the 

 ninth. 



Trypopremnon sanfordi, n. sp. (PI. 28) 



Described from a single specimen collected in quarantine by Mr. H. 1,. 

 Sanford September 24, 191 5, from a potato tuber sent by Mr. O. F. Cook 

 from Cuzco, Peru.^ The excellent illustrations of the type (PI. 28) were 

 made under the writer's supervision by Mr. H. B. Bradford. 



Length 8 mm., greatest breadth 4.5 mm. Beak longer than head and narrower 

 than eyes; the dorsal squamose portion being gradually narrowed from eyes to nasal 

 plate. Alae strongly flared, making the scrobes open above. Head tumid above 

 the eyes. Median line slightly depressed on head, strongly in frontal fovea, and 

 very faintly on beak except just behind nasal plate. Lateral depressions on beak 

 strong. Apex of beak brownish black, -with nasal plate polished, convexly raised 

 around margin, emarginate at apex. Mandibles shining brownish black; deciduous 

 piece reddish brown, lightest at tip, moderately long, arcuate, with sharp edges; 

 the ventral tooth is not as acute as in T. latithorax; there is a slight denticle on the 

 right deciduous piece, and the left mandible is denticulate as shown in the figure. 

 The antennal scrobes are strongly flexed downward, very much broadened and 

 evanescent behind; scape clavate; fimicle with first two joints elongate, the others 

 progressively shorter, the last moniliform; club as long as the foiu- preceding joints. 

 Head, beak, and scape densely clothed with fine silky-bronze scales, and with scat- 

 tered white setae; funicle sparsely setose; club minutely pubescent, sparsely setose. 



Prothorax basally truncate, slightly broadly emarginate at middle; apically sinuate; 

 with very strong supraocular lobes, which have vibrissae on the inner surface; surface 

 coarsely irregularly punctured, finely densely squamose with golden metallic scales," 

 sparsely setose with white curved setae; surface very uneven, with median depression 

 bordered by antemedian ridges and two postmedian tubercles; sides prominently 

 produced by two angulate tubercle's; widest at posterior tubercles. 



Elytra at base narrower than thorax; humeri tuberculate; sides subparallel but 

 very roughly tuberculate, abruptly narrowed at posterior declivity which is nearly 

 perpendicular. Scutellum triangular. Surface densely minutely squamose, sparsely 



' Recorded under Federal Horticultural Board No. 4348. 



