NO. 1432. 



NEW SPECIES OF EARWIGS— REHN. 



509 



CHELISOCHES STRATIOTICUS, new species. 



7yj9^.— Female; Trong-, Lower Siam. (Dr. W. L. Abbott.) [Cat. 

 No. 8170, U.S.N.M.] 



A member of the group com\)r\Bmg i^ulchripennis and glauc<q)terus^ 

 but apparently closer to the last-mentioned species. It can be readily 

 distinguished l\y the shorter pygidium, the more depressed and less 

 distinctly dentate forceps, and several other characters. 



Size large; form subfusiform, greatest width abdominal, depressed; 

 surface subglabrous, the abdomen finely punctate. Head longer than 

 broad, strongly depressed with a pair of converging depressions extend- 

 ing- back from the eyes; lateral margins slightly and gradually con- 

 stricted caudad of the eyes; caudo-lateral angles moderately rounded; 

 caudal margin with a median rotundate emargi- 

 nation; eyes small, hardly projecting beyond the 

 head; antenna? composed of fourteen segments, 

 the proximal large, cylindrical, strongly con- 

 stricted toward the head; second joint small, 

 short; third joint about half the length of the 

 first; fourth joint small, but larger than the sec- 

 ond, remaining joints gradually increasing in 

 length distad. Pronotum subquadrate, lateral 

 margins slightl}'^ expanding caudad, cephalic 

 margin subtruncate with a median low rounded 

 protuberance, caudo-lateral angles rounded, cau- 

 dal margin rotundato-angulate; cephalic half 

 with a crescentic depressed area on each side 

 extending from the antero- lateral angles to the 

 median line, a shallow and rather indistinct lon- 

 gitudinal median sulcus present on the cephalic 

 half. Tegmina almost twice the length of the 

 pronotum; "shoulder'" angles projecting little 

 beyond the sides of the pronotum; caudal mar- 

 gins truncate. Exposed portions of the wings extending a distance 

 beyond the tegmina less than the length of the pronotum, rounded, 

 tips narrowly truncate. Abdomen with the dorsal margins of the 

 distal segments with numerous short plica?, strong lateral plicte present 

 on the third segment; anal segment strongly transverse, caudal margin 

 truncate, thickened and supplied with rasp-like tubercles except on 

 the median section, which is depressed with a median sulcus between 

 two small tuberculate ridges; subgenital plate transverse, the margin 

 arcuate; pygidium longitudinal, reversed cuneiform, the distal portion 

 not more than half the proximal width, apex roundly emarginate. 

 Forceps about equal to the head, pronotum, and tegmina in length, dis- 

 tinctly depressed, very gently arcuate, except the distal fourth which 



Fig. 6.— Chelisoches stkat- 



lOTICUS. X 2. 



