62 THE GYPSY MOTH APPENDIX. 



short, with well-developed scutelluni. Wing-pads extend- 

 ing about one-third the length of abdomen. Abdomen 

 widened at the middle with lateral flanges developing with 

 the approach of maturity. Near the posterior margins of 

 the dorsum of each abdominal segment there is a faint red- 

 dish-brown spot, from which a light line extends forward 

 on either side to the anterior margin, then bends at an acute 

 angle and runs backward to the posterior angles of the seg- 

 ment. Antenna? filiform. Legs slender, anterior pair the 

 stoutest ; tarsi brown ; claws dark brown. 



Imago. This species, along with a number of Mexican 

 Hemiptera, was originally described by Stal in 1862 (Stet- 

 tinor Entomologische Zeitung, 23 jahrgang, page 452) as 

 Zehis luridus, from Carolinian examples. Uhler, in his 

 check list of the Hemiptera Heteroptera of North America 

 (1880), places the species in the genus I)!i>ltxlux, as es- 

 tablished by Amyot and Serville in their " Hemipteres '' 

 (1843), page 370. Lethierry and Severin, in their " Cata- 

 logue general des Hemipteres" (1896), have replaced the 

 species in the genus Zelu*. The sexual dimorphism ex- 

 isting in this species is worthy of note; unless otherwise 

 informed, one might readily believe that the sexes of this 

 insect represent different species. 



Male. (Plate 2, Fig. 5.) Length, 13 mm. Body nearly 

 linear, dark brown, varying to black on the upper surface. 

 Head narrow, elongated, and projecting to a blunt point 

 between the bases of the filiform antennae. First joint of 

 the antennae dilated at base, slender, and of about the same 

 length as that of the head and thorax taken together ; 

 second joint one-third as long as first ; third joint over 

 two-thirds as long as first ; fourth joint about the same 

 length as second. Eyes prominent, dark reddish brown ; 

 ocelli large, in rear of the eyes on slight prominences of 

 the head, which is widened at this place. Base of head 

 smooth and shining. Prothorax dark brown, varying to 

 black, rounded posteriorly and with a very small blunt 

 black spine at the posterior angles. Two semi-lunar de- 

 pressions extend inward from indentations in the sides of 



