April, '07] ENTOMOLOGICAL NEWS. 1 27 



Cicada llnnei nov sp 



Length. — ?, 31-34 mm., to tip of wings 45-50 mm., <?, 29-33 mm., to 

 tip of wings 44-48 mm. 



This species has been regarded as the tibicen of Linnaeus. Typical 

 specimens are widely different from specimens typical of canicularis, 

 but occasional examples occur which are almost intermediate and are 

 difficult to place correctly. In the large number of both species be- 

 fore us, however, the few such forms compared with the large number 

 which are recognized at a glance leaves small room for doubt as to 

 there being two species. Linnei differs from canicularis chiefly as 

 follows: By the greater size of the individuals and the more promi- 

 nent eyes; by the thoracic markings, the component parts of the 

 pattern of which are not so closely set as in canicularis, thus showing a 

 greater amount of the green background; by the comparatively larger 

 size of the basal spots of the abdomen of the male (there are none 

 in the female) ; in the greater comparative length of the second 

 abdominal segment of the male, and in the longer opercula, which 

 are usually as long as broad and almost always light in color. The 

 genitalia are like canicularis. 



There are a few male examples in the series before us 

 which lack the pruinose spots at base of the abdomen, but these 

 seem to have been in alcohol, which causes the disappearance 

 of such spots. 



Habitat. — This has probably the same range as canicularis ; 

 specimens before us show its occurrence from Boston. Massa- 

 chusetts, westward to Michigan and Illinois, and southward to 

 Tennessee and Black Mountains, North Carolina, early August 

 to mid-September. 



Cicada davisi nov. sp. 



Length — 6* and ° 29-31 mm., to tip of wings 42-45 mm. — Head black, 

 anterior margin betwen the eyes and clypeus and a spot in the center 

 of the clypeus green. Pronotum including posterior and lateral 

 margins green except for a single pair of black marks which begin 

 at the anterior margin immediately behind the eyes, become sud- 

 denly broad, then taper posteriorly, but do not join as usually do 

 the corresponding marks in canicularis; the dilation also begins much 

 farther from the anterior margin, which in canicularis is so close as 

 to be separated only by a narrow line of green; the space between 

 the pronotal sulcus and the posterior margin is much longer than 

 in canicularis. The mesonotum has markings similar to canicularis, 

 but the median posterior spot is much shorter, leaving a broad space 

 of green; the two lateral pairs of marks are fused together. The 

 abdomen is black, without white spots at the base. Beneath it is 



