Genera and Species of Coccldaj. 21 



posteriorly, narrowing anteriorly, with tlie anterior cn'l 

 pointed, the head being the narrowest part of the whole 

 insect; abdomen very distinctly segmented; colour very 

 dark ))ur[)le-groy ; insect entirely covered by a white cottony 

 secretion, in whicli are laid many ])alc pinkish eggs, which 

 are rather more elongate than is usual in the genus. 



Wliole insect very free from hairs, except the caudal region, 

 which is quite hairy. Legs not hairy. No noticeable caudal 

 tubercles nor especially large caudal bristles. Hairs of anal 

 ring six, about 75 long. Labium very short and broad, 

 length 60, breadth 78. Middle leg with femur + trochanter 

 108, tibia GO, tarsus 45 ; wadth of femur 33. This is from a 

 female which had laid eggs; another, containing embryos, 

 had femur + trochanter 91), tibia 42, tarsus 42; width of 

 femur 27. It would seem that an immature form of leg may 

 last until a very late period. 



Antenna? 192 /i apart, six- jointed, joints measuring : (1) 24- 

 30, (2) 27, (3) 24-30, (4) 18, (5) 21-27, (6) 45-5L 



cJ . — Dark-coloured, about 430 long (when dry) ; antennse 

 normal ; wings long, length about 800. The only male 

 found was dead and shrivelled. 



Hah. On stems of SporohoJus depauperatus (Torrey), this 

 grass kindly identified for me by Mr. E. D. Merrill. Arroyo 

 Pecos, Las Vegas, New Mexico, Oct. 5, 1901. 



The antennas are remarkably small and resemble in 

 measurements those of R. serrata or the penultimate stage of 

 R. viridula ; but these insects are in other respects very 

 different. 



\\\ all things R. sporoboli is most nearly I'elated to R. fes- 

 tuca;, Kuwana. For purposes of comparison I have made 

 the following measurements of an example oi festuae having 

 G-jointed antennse, received from Mr. Kuwana : — 



Rtpersia festucoif Kuwana, 1901. 



Labium 72 long, 90 broad. Middle leg: femur + tro- 

 chanter 180, tibia 120, tarsus 6G. Antennal segments: 

 (1) 42, (2) 45, (3) 54, (4) 27, (5) 33, (G) 75. This species 

 is found in California. 



Dactijlopius salinus, sp. n. 



5 . — Grey, with some white secretion ; six caudal tassels 

 and two cephalic ones. Boiled in liquor potassaj turns 

 crimson ; legs and antennas ferruginous. Mounted specimen 

 about 2830 long, 1350 broad. iSkin with numerous small 

 round glands and a very few hairs ; no distinct caudal 



