OF WASHINGTON. 155 



Basal joint of antenna longer than broad, second joint twice as long as 

 first, third one and one-half times as long as the second, fourth as long 

 as the rest together, divided into 18 or 20 subjoints. Abdomen rather 

 long; behind is a prominence each side; dorsum clothed with rather long 

 hairs; furcula of moderate length, the dentes about four times as long as 

 broad at base, with hairs beneath, mucrones about one-third the length 

 of the dentes, finely serrate below. Length, 2. mm. 



Washington, D. C., under dead leaves, January. Separated 

 from S. sylvestris by the markings of head and antennae, and 

 dorsum of abdomen. 



Smynthurus trilineatus, n. sp. 



Pale; head and basal half of abdominal dorsum with three brown stripes, 

 the lateral one passing through eye and base of antenna down upon the 

 face, behind on abdomen they converge toward the middle; the middle 

 stripe, which is narrower and with more even margins, on the head does 

 not extend much beyond bases of antennae, behind reaching as far as 

 lateral stripes; just beyond the ends of these stripes and across the mid 

 dle of dorsum is a blackish band, behind which are two large submedian 

 black spots, narrowly connected to a smaller median one behind on the 

 anal tubercle, a few less striking ones on the sides; legs pale ; spring 

 pale; antennas brown. Basal joint of antenna short; the second full}' 

 twice as long; third one and three-fourths times as long as the second; 

 fourth as long as rest together, with about 18 annulations ; dentes about 

 three and one-half times as long as wide at base, with hairs below; 

 mucrones fully one-third the length of the dentes, finely serrate below. 

 Length, 1.6 mm. 



Washington, D. C. Hopping over moss and dead leaves in 

 May. 



Mr. Heidemann read the following paper : 



REMARKS ON LIGYROCORIS CONSTRICTUS SAY AND DE 

 SCRIPTION OF PERIGENES FALLAX, A NEW SPECIES. 



By O. HEIDEMANN. 



Some time ago in working on the group Myodocharia of the 

 Family LygaBidae I found that my material of Liygrocoris con- 

 str ictus Say, from Washington, D. C., Florida and Texas, con 

 tained two different forms which I had formerly determined as 

 belonging to one species. The mutual resemblance of the two 

 forms is very striking. Anyone might easily be deceived, and it 

 seems that this has often been the case, as the writer learned 

 later through his correspondence on the subject. 



