224 FAMILY VI.-LOCUSTID.©. 



Microcentrum lauritoUum Linn. 



LARGER ANGULAR-WINGED KATYDID. 



General color light grass green, the body yellowish-green, 

 lighter beneath. Vertex quite broad, with the center hol- 

 lowed out so as to form a shallow pit, which is more prom- 

 inent in the male. The pronotum is about as broad as long, 

 its anterior margin a little concave and usually possessing a 

 slight median tooth, though this is sometimes obsolete, or 

 is replaced with a shallow notch. The overlapping dorsal 

 surface of the wing-covers form a sharp and prominent 

 angle with the lateral portions, hence the common name 

 "angular-winged." 



This insect, very common in the southern states, has 

 been found near Winona, but will very likely occur also else- 

 where. It is sometimes attracted to the electric light. 

 Wherever it occurs it is most commonly called "the Katy- 

 did," though the sounds produced by it are quite different, 

 being something like the syllable "tic" repeated from eight 



Fig, 148. — Microcentrum lauriColium, tnale. After Riley. 



to twenty times at the rate of about four to the second. 

 The grayish-brown eggs, long oval in shape, very flat, meas- 

 uring 5.5x3 mm., are usually 

 glued in double rows on the 

 sides of tender twigs, or on 

 C^C^;^::^) the edge of leaves, which have 



/^<^^^vll been previously roughened 



^iit^ ''■ '0 with the jaws and otherwise 



Fig. 149.— M/crocentrum laurifoUum; prepared for a placc of dcposit, 



a, ovipositor, nat. size; b, tip of same, _,, 



enlarged. After Riley. 1 hc twO rOWS arC COUtlgUOUS 



