OF WASHINGTON, VOLUME XVIII, 1916 177 



Fig. 3. Cephalopharyngeal skeleton seen from the left side. Outline 

 by camera lucida. X 100. 



Fig. 4. Ventral view of the terminal segment, showing spiniferous pad 

 and spinules on the margin of the anal area. 



Fig. 5. Posterior stigmata. Outline by camera lucida from a slide 

 mount after treatment with KOH. X 100. 



A NEW SPECIES OF WEEVIL INJURING ORCHIDS.' 



BY H. S. BARBER, Bureau of Entomology. 



In 1913 a specimen of a beautiful black and white weevil was 

 brought in by Mr. Heidemann from Field's greenhouse in this 

 city where it had been found on a plant of Cattleya mossiae sup- 

 posed to have come from Venezuela, and was determined by Mr. 

 Schwarz as Cholus forbesi Pascoe 1876, since it agreed with the 

 original short Latin diagnosis 2 cited by Champion 1906. 3 Re- 

 cently another specimen was received for determination from Mr. 

 J. G. Sanders with the statement that much damage was being 

 done to Cattleya orchids in a greenhouse in Milwaukee, Wis., the 

 large pale yellow larvae burrowing in the stems and practically 

 killing the plant beyond the point of injury. The unsatisfactory 

 nature of Pascoe's diagnosis and the omission of mention of the 

 nude pronotum in Champion's allusion to this species caused the 

 writer to forward a photograph and sketch of the ventral mark- 

 ings to Mr. G. C. Champion in London for verification of the 

 determination, but he replied that although allied to Cholus for- 

 besi Pascoe, C. nigronotatus Champ., and C. nigromaculatus 

 Champ., of each of which he had seen two specimens displaying 

 no noteworthy variation, the species in question is evidently dis- 

 tinct from them, all three having a variegated pronotum and dif- 

 ferent elytral patterns. It is possible that the species has already 

 been described but a search of the more recent literature did not 

 disclose a similar species and it is thought best to describe and 

 illustrate the species as new. Mr. Sanders has tried to trace the 

 origin of the colony at Milwaukee but beyond learning that the 

 weevils probably were introduced in plants purchased in 1915 

 from a Philadelphia firm and that these plants came either from 

 Colombia or northern Brazil, he could secure no accurate infor- 

 mation. 



1 Cholus cattleyae Champion, Ent. Month. Mag., Sept., 1916, p. 201, may 

 be this species but it has pronotal maculae. 

 2 Proc. Ent. Soc. Lend., 1876, p. XXX. 

 3 Biol. Centr.-Amer. Coleop., vol. 4, pt. 4, p. 742. 



