TI[E PIjEASING fungus BEETliES. 547 



VII. Tritoiia Fab. 1775. (Gr., "three + joint") 



Small oval or oblong species, black or red and black in color, 

 having the anteniial <'lub 3- or 4-jointed, the last joint of maxillary 

 palpi broadly dilated and the middle area of nieutum small and 

 triangular. Some of the species are to be found by hundreds "in 

 fungi during the summer and autumn, having resorted thereto to 

 deposit their eggs, whieh hatch into maggot-like larvae which feed 

 upon the juices of the fungi. About 15 species are known from the 

 United States, eight of which have been taken in Indiana, while two 

 others may occur. 



KEY TO INDIANA SPECIES OF TEITOMA. 



a. Elytra more or less red. 



6. Red of elytra limited to spots on humerus. 



c. Under side piceous-black, the apex of last segment alone pale. 



1045. HUMEBAUS. 



cc. tinder side entirely pale. 1046. biguttata. 



1)1). Elytra nearly entirely red or with broad central reddish-yellow band. 



d. Form ovul; elytra red with outer margins black. 



1047. MIMETICA. 



ihl. Fiinii oblong; elytra with broad reiitral band of reddish-yellow. 



104S. festiva. 

 (/((. Elytra wholly black. 



('. Head and thorax of same culor as elytra. 



f. I'.eueath piceous, the legs and palpi brownish-yfllnw. 



1049. ANGULATA. 



ff. Beneath black, the tarsi and palpi piceous. 1050. unicoloe. 



cc. Head or thorax or both, paler than elytra. 



g. Head reddish-yellow, thorax and elytra concolorous. 



EBYTHROCEPHALA. 



gg. Head and thorax both yellow. 

 h. Body beneath reddisli-yellow. 



(. Antennas entirely black ; elytral intervals obsoletely punctulate. 



MACRA. 



a. Antennae black, red at base ; elytral intervals sparsely but dis- 

 tinctly punctate. 1051. xhoeacica. 

 hh. Body black beneath. 1052. flavicollis. 



1045 (3225). Teitojia humeralis Fab., Syst. Eleut., II, 1801, 571. 



Broadly oval. Black ; antennffi, legs and a subquad- 

 rate spot near the humerus of each elytron, reddish-yel- 

 low. Head and thorax distinctly and rather closely punc- 

 tate. Elytra with rows of fine punctures, the intervals 

 very obsoletely punctulate. Length 3-^ mm. (Fig. 206.) 



Southern half of State ; frequent. Not yet taken 

 in the northern counties. April 22-September 29. (After wickLnj 



