NO. 10 



MORPHOLOGY OF GNATHOTRICHUS — SCHEDL 



17 



Gnathotrichus sulcatus Lee. 

 Length, 3.59 mm. 



The body is 3.38 times as long as the width of the pronotum. 

 Width of the pronotum, 1.07 mm. 

 The elytra are 1.60 times as long as the pronotum. 

 Examined specimens, 10. 



Head 



^^^domev^ 



Fig. 2. — Gnathotrichus mafcriarius Fitch, adult male, ventral aspect. 



An, antenna; Cc, coxal cavity; Co, coxa; Ep, epistoma; Epin, epimeron; Epst, episternum; 

 Ey. compound eye; Gu. gular area; Hst. hypostoma; La, labium; Msst, mesosternum; Msth, 

 mesothorax; Md, mandible; Mtst, metasternum; Mtth, metathorax; Mx, maxilla; Pr, 

 pregula; Prst. prosternum; Pith, prothorax; st, sternite; 5"^/, sternellar area; a, median line. 



Color. — The color ranges from a reddish-brown to nearly black in 

 mature specimens ; it is of no imjxjrtance in this genus. 



Vestiturc. — -In general it can be said that all three species are with- 

 out extraordinary hair characters ; few large bristles occur on the 

 declivity. However, by careful examination under the microscope it 

 was found that all external parts are more or less covered with fine 

 hairs. 



