230 
Psyche 
[October- December 
discovered a description which applies 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 2 gave an account of the hollyhock bug, 
and described and figured the species under the name u Orthotylus 
(. Psallus ) delicatus Uhler 3 .” 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 4 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 Agricultural 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 lectotvpe of the species. 
The following reclescription 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, 3| mm. 
Head, with the eyes, very nearly M 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 
2 Bull. 76, Mich. Agr. Coll. Exper. Sta. p. 10. This bulletin is entitled "Kerosene 
Emulsions." 
3 This is not the Psallus delicatus Uhler 1887, described in Ent. Amer. iii, p. 34. 
4 Proc. Ent. Soc. Wash., ii. 1892, p. 226. 
