230 Psyche [October-December ' 



discovered a description which appHes perfectly to the specimens 

 before me. This description appears to have been overlooked, 

 and is not listed in Van Duzee's catalogue. 



In 1891, A. J. Cook' gave an account of the hollyhock bug, 

 and described and figured the species under the name ^'Oiihotylus 

 (Psallus) delicatus Uhler\" His description is quite ample for 

 recognition of the species; and, inasmuch as the name he employs 

 is merely one of Uhler's manuscript designations, the species 

 must be known as Orthotylus delicatus Cook. Heidemann^ also 

 records an Orthotylus delicatus Uhler MS, from the District of 

 Columbia; but since his form occurred only on ash trees, while 

 Cook's species, in my experience, is confined to hollyhocks, 

 I doubt the identity of the two. 



That the specimens taken by me at Ann Arbor belong to 

 Cook's species is confirmed by examination of the specimens 

 standing in the collection of the Michigan Agricultiu'al College un- 

 der the name Orthotylus delicatus Uhler, which Professor R. H. Pettit 

 has kindly forwarded to me. Only two of these specimens were 

 collected prior to the date of Cook's description, and I have 

 therefore designated one of these as the lectotype of the species. 

 The following redescription is drawn up from fresh material. 



Orthotylus delicatus Cook. — Oblong-oval; green, the mem- 

 brane smoky with the veins calloused, greenish or whitish; body 

 sparsely clothed with white hairs, the dorsal parts also with 

 short, thick, closely appressed black hairs. Length, 82 mm. 



Head, with the eyes, very nearly /^ as wide as the pronotum 

 at base, and about twice as wide as long (in dorsal aspect); 

 basal carina low and inconspicuous, vertex broadly flattened; 

 clypeus, seen in profile, projecting beyond the frons by nearly the 

 thickness of the basal antennal segment. Eyes occupying about 

 one-half (19/36) of the vertical height of the head. Antennae 



2Bull. 76, Mich. Agr. Coll. Exper. Sta. p. 10. This bulletin is entitled "Kerosene 

 Emulsions." 



3This is not the Psallus delicatus Uhler 1887, described in Ent. Amer. iii, p. 34. 



4Proc. Ent. Soc. Wash., ii. 1892, p. 226. 



