130 Mr. G. C. Champion's Revision of the Mexican 



$. Terminal dorsal abdominal segment only produced on each 

 side into a long, flattened, subtriangular process (Plate III, fig. 14). 

 Length 7-8 mm. (c??.) 



Hah. Mexico, Chilpancingo in Guerrero {Hoge, H. H. 

 Smith). 



Nine males and eight females, the males readily dis- 

 tinguishable by the double pair of abdominal forceps. 



2. Ichthyurus forficulinus. 



$. Trypherus forficulinus, Gorh., Biol. Centr.-Am., Coleopt. 

 iii, 2, p. 98, pi. 6, fig. 7. 



Hab. Guatemala, Quiche Mts. 



The unique type of this species is a female. There is a 

 very similar form, $, from Sarayacu, Peru, in the British 

 Museum, too imperfect to describe. 



3. Ichthyurus trimaculatus. 



Trypherus trimaculatus, Pic, Melanges exot.-entom., fasc. xi, 

 p. 9 (Nov. 1914). 



" Grandis, elongatus, fere opacus, niger, infra corpore pro majore 

 parte, capite antice, luteo-testaceis, thorace luteo-testaceo, in disco 

 nigro trimaculato (macula mediana minuta, externis arcuatis), 

 elytris nigris, apice late luteo-testaceo notatis. Long. 10-11 mill.'* 

 DifEere, a premiere vue, de T. forficulinus, Gorh., par le prothorax 

 orn6 de 3 macules noires. 



Hab. Mexico, Jalapa {coll. Pic). 



Apparently a close ally of the Guatemalan I. forficulinus, 

 and evidently belonging to the same genus. Included by 

 Pic amongst the species placed under the heading " De- 

 scriptions abregees," the sex, etc., not being mentioned. 



4. Ichthyurus fuscus. 



$. Belotus fuscus, Gorh., Biol. Centr.-Am., Coleopt. iii, 2, 

 p. 99 (excl. var.). 



Hab. Mexico, Yolos in Oaxaca. 



Represented in the " Biologia " collection by three 

 imperfect females ; the so-called variety from the same 

 locality is a dark male of Belotus abdominalis. In these 

 examples the yellow apical patch on the elytra extends 

 forwards along the outer margin to near the humeri, the 



