ALLOCHROMA. 437 



narrow transverse testaceous band at the middle, and another at the apices and connected with the lateral 

 margin. 

 Var. 6. Black, the lower part of the face and the abdomen pale fulvous. 



A. sexmaculatum seems subject to great variation in regard to colour and size, and 

 the elytral bands may almost entirely cover the surface, or the entire insect may be 

 black, with the exception of the face and the abdomen ; these forms were not known 

 to Clark; this author gives the fifth and sixth joints of the antennae as being longer 

 than the third, but in all the specimens I have examined, including the type, I find 

 that these joints are of equal length ; neither can the head be called impunctate, as 

 some fine and remotely-placed punctures are distinctly visible when seen under a strong 

 lens ; there is also a deep central fovea above the insertion of the antennae. 



2. Allochroma fasciatum. (Tab. XXV. fig. 4.) 



Allochroma fasciatum, Clark, Cat. Halticidae, p. 186, t. 7. fig. 8 \ 



Hab. Mexico \ Cordova, Tuxtla (Salle), Jalapa (Hoge) ; Guatemala, Zapote, La Tinta' 

 Purula, Senahu, Sinanja, Chacoj, and Cubilguitz in Vera Paz (Champion); Costa Rica. 

 — South America. 



The width of the two elytral black bands in this species is subject to variation, as 

 is also the colour of the antenna?, which may be entirely black, or black and the apical 

 two or three joints fulvous ; the head is generally finely punctured (which Clark does 

 not mention), and is devoid of the more or less deep fovea by which A. sexmaculatum 

 may be known from this species. A specimen from Costa Rica before me has the bands 

 of the elytra reduced to four small spots. 



3. Allochroma quatuor-pustulatum. 



Allochroma quatuor-pustulatum, Clark, Cat. Halticidae, p. 191 \ 

 Hab. Guatemala 1 . 



I have not seen a specimen answering the description given by Clark, who compares 

 the species to his A. festivum. In the diagnosis the author speaks of four elytral spots, 

 but in his description of the species he only mentions two. 



4. Allochroma festivum. (Tab. XXV. fig. 7.) 



Allochroma festivum, Clark, Cat. Halticidse, p. 192'. 

 Hab. Guatemala, Zapote (Champion). — Brazil \ 



A typical specimen in the Baly collection from Brazil agrees perfectly with those from 

 the above locality in structural characters, but the coloration of the specimens from 

 Guatemala is different : these have the two elytral spots connected in the shape of a longi- 

 tudinal posteriorly pointed band, leaving only the margins of the fulvous ground-colour ; 



