1910.] NATURAL SCIENCES OF PHILADELPHIA. 417 



rami varying from three to four in number. Supra-anal plate and 

 cerci essentially as in deropeltiformis. 



Head, pronotum, dorsum of abdomen, venter and coxae shining 

 pitch black. Tegmina burnt sienna, darkening to blackish chestnut 

 proximad and fading to tawny distad and along costal margins. 

 Wings tawny infuscate. Limbs and mouth-parts ochraceous. An- 

 tennae and abdominal appendages blackish. 



9. Size small; body depressed; form elliptical-ovate. Head 



completely hidden under pronotum; antennae 



shorter than body. Pronotum semi-elliptical, 



caudal margin subtruncate, almost imper- 



., , , . , , , Figs. 3 and 4—Isch- 



ceptibly produced mesad, somewhat truncate noptera nigricollis 



cephalad, depressed dorsad, lateral deflected Walker Supra-anal 



. plate of o (X4) and 



portions rather broad; oblique sulci not evi- Cj (5) Male; Jack- 

 dent, Tegmina subquadrate, reaching base of sonvffle, Florida: fe- 

 abdomen; costal and sutural margins arcuato- 



truncate, distal margin slightly oblique subsinuate, apex broadly 

 rounded and costal in position. Wings reaching to apex of tegmina. 

 Supra-anal plate transverse trigonal, angle obtuse; cerci depressed, 

 fusiform, acute. 



Coloration exactly as in male, tegmina darkened proximad and 

 along the costal field. 



Measurements. — d\ Length of body 11-13.2 mm.; length of 

 pronotum 3-3.5 mm. ; greatest width of pronotum 4-4.2 mm. ; length 

 of tegmen 12.5-15 mm. ; greatest width of tegmen 3.8-4.6 mm. 



d\ Length of body 12.3 mm. ; length of pronotum 3.5 mm. ; greatest 

 width of pronotum 4.5 mm.; length of tegmen 3.2 mm.; greatest 

 width of tegmen 3 mm. 



Distribution. — The only previous records for the species are given 

 in the leading references, while the material now in hand from De 

 Funiak Springs, Jacksonville and St. Augustine, Fla., and "Florida," 

 carries the range to the south and west. The species is now known 

 from Georgia and Florida, all the definite records being from the 

 northern half and western extension of the latter State. 



Remarks. — The junior author, while in London several years ago, 

 examined the type of nigricollis in the British Museum and the asso- 

 ciation of the material in hand with this species is warrant* d by his 

 notes and recollections. His notes are as follows: "/. nigricollis, 

 Ga. Abdomen absent. Right half of pronotum damaged. Pro- 

 notum uniform dark brown same shade as central part of pronotum 

 of dark I. pensylvanica. Wings shining pale (color of I. johnsoni legs). 



