438 



EEPORT OF STATE GEOLOGIST. 



Icnijjth coiilained in lluit ol' ovipositor 1.1 times. Ovipositor always 

 sliorter than tlie bod}^, its average length being 13.5 mm. 



Measurements: Length of body, male, 

 17.5 mm., female, 17.1 mm.; of pronotum, 

 male, 3.9 mm., female, 4.2 mm.; of tegmina, 

 male, 11.5 mm., female, short Avinged form, 

 10 mm., long winged form, 12.4 mm.; of 

 hind femora, male, 12.2 mm., female, 12^4 

 mm.; of ovipositor, 13.5 mm.; width of pro- 

 notum, male and female, 6.3 mm. 



From ahbreviaius this species may be dis- 

 tinguished by the shorter body, the less 

 swollen head of male and especially by the 

 short ovipositor, which in Indiana speci- 

 mens ranges between 13 and 14 mm. in 

 length. The main distinguishing charac- 

 ters between pennsylvanicus and americanus 

 have been set out under the latter species. 

 Another, very noticeable in the field in the 

 spring, is the dull grayish tinge of pennsyl- 

 vanicus, especially on the legs and prono- 

 tum, the whole body of americanus being 

 shining black. 

 The description of pennsylvanicus by Burmeister is as follows: 

 "Eine ahnliche Art (Gr. pemisylvanicus ) findct sich in Nord-ameri- 

 ka; sie ist etwas kleiner, die Flugeldeckon kurzor nls der Leib, ohne 

 gelbe Basis, aber mit bjaunlicher ITauptlangsader.*' This descrip- 

 tion is so short and vague that it is impossible to ascertain from it 

 just what species he had at hand. Neither Saussure nor Scudder 

 seem to have seen Burmeisters type. If so, they have made no 

 record of the fact. Saussure in his latest paper, followed by Mc- 

 Neill, has assertred his belief that pennsylvanicus is a short winged 

 form of luctuosus. However, the measurements of body and oviposi- 

 tor of luctuosus as given by Serville agree so closely with those of 

 ahbreviaius that there can be no doubt of the two being the same. 

 The existence of the long winged forms of both abireviatus and the 

 species I call pennsylvanicus has done much to add to the confusion. 

 I have therefore followed Scudder, Beutenmiiller and others in ap- 

 plying the name pennsylvanicus to the form at hand, though I have 

 no definite means of knowing that it is the same insect as that to 

 which Burmeister gave the name. Certain it is, however, that it is 

 distinct from both americanus and abbrcviaius described above. 



Fitt-llO. Cjryllus penvsylvani- 

 cus (Burm.) Short-wingod 

 female. (After Lugger.) 



