Mexican and Central American Chaidiognathinae. 1G3 



A long series of each sex, the single female in the 

 " Biologia " collection having been left undescribed by 

 Gorham for want of material. The two sexes of this 

 insect are so dissimilar that they might easily be mistaken 

 for different species, C. dispar in this respect approaching 

 C. corviniis, Gorh., which, however, has the intermediate 

 joints of the antennae much widened in the female. The 

 male has the facies of a small Leptura. C. jlavomarginaius 

 and C. constrictus are still more nearly allied forms, the 

 females being sometimes similarly coloured, that of the 

 present species being separable from C constrictus by the 

 more rounded sides of the prothorax and from that of 

 C. flavomarginatus by the less expanded margins. Two 

 males have been dissected. 



36. Chauliognathus forreri. (Plate III, figs. 13, 

 14, c?, vars. /3, y.) 



Chauliognathus forreri, Gorh., Biol. Centr.-Am., Coleopt. 

 iii, 2, p. 282 ($). 

 Hab. Mexico, Ventanas in Durango [or Sinaloa] {Forrer : 

 types), Rincon, Venta de Peregrino, and Tierra Colorada in 

 Guerrero {H. H. Smith : ^^ $). 



Var. a. The elytra with a discoidal fuscous stripe of varying 

 extent, sometimes leaving only the sutural and outer margins 

 flavescent, the dark spots on the head and prothorax (as in some 

 typical C. forreri) reduced in number or altogether wanting. ((^ ?.) 



Chauliognathus subulipennis, Gorh., loc. cit. p. 282 ($). 



Hab. Mexico, Rincon in Guerrero (//. H. Smith : c^ ?), 

 Tehuantepec {Sumichrast : types). 



Var. fi. The dark spots on the head larger, those on the prothorax 

 more extended or confluent (leaving three irregular yellow streaks), 

 the elytra wholly fuscous, the sides below the humeri excepted. ( ^. ) 

 (Fig. 13.) 



Hab. Mexico {Coffin, in Mus. Oxon.), Chilpancingo in 

 Guerrero {H. H. Smith). 



Var. y. Head with two spots between the eyes, and the prothorax 

 with 2, 4, 6, 8 or 9 spots on the disc, black, all these markings some- 

 times obsolete ; elytra with the apical half or two-fifths black, for 

 the rest ochreous. (<?$.) (Fig. 14.) 



Hab. Mexico, Huetamo in Michoacan {Hoge), Venta de 

 Zopilote in Guerrero {H. H. Smith). 



