NBUBOPTBRA TMOHOPTBBA HYDROP8YOHLD2B. 189 



_'. MESOBROCHUS IMBECILLIS. 

 H. 15, Fi-. i:i. 



Closely allied to the preceding, but a smaller and comparatively stouter 

 form. The basal joint of the antenna' is cylindrical, and though very!;: 

 not so stout as in that .-.peril--, hut the stalk i- as there The h-^ s are a little 

 shorter and less slender. Wings shaped as in M. letha-us, liut compara- 

 tively a little shorter; the neuratlOD appears to he identical with that of the 

 other species fit is wrongly given on the plate), excepting 1 that the anasto- 

 mosis is even farther toward the base of the wing. 



Length of bod \, .">.")"""; of front wing-, i;.2.">""" ; width of same, _'""". 



Florissant. Sixteen specimens, Nos. 1306 and 1 -I _':;. -'177, 2:5<;4, 2984, 

 4908, 5462, 6861, 7042, 7568, 7883, 1 <>_>_:.. loK>7. Ki|;;n. HoOo, L2234, 

 13138. 



7. 1'ALADICELLA gen. nov. (?ra\ai6?, a-, <S/eAA). 



Still another anomalous genus is found among the Florissant Hy- 

 drop-.vchid.-e. in some respects allied to Mesohroclms. since the tir-t and tilth 



apical cells are wanting and the other apical cells are nearly equal and hm- 



Tlie other features, however, are very different, partlv perhaps from the 

 much greater comparative brevity and breadth of the \\ing. The third and 

 fourth apical cells are so closely approximated as nearly to touch throughout 

 their length, even to the very margin of the wing. The discoidal cell i- 

 closed and relatively much shorter than it would be in Mesobrochufl w>-i, 

 it closed at the same time: that is to >ay. the branch of the >ector usually 

 furnishing the first apical sector has a much later origin in Paladicella than 

 in Mesohrochus. The name given is not meant to have any reference to 

 the recent genii- Adicella. 



I'M,. \iurr.i. i. \ i 1:1 I-TIOMS. 

 I'l. i:., Fi- I I. 



This >p,-cies is represented by a single specimen and its re\. T-,. : toler- 

 al>l\ well pre>e|-\ed on a dor>al \ iew with partiallv expanded \\ings. The 

 body is moderatc-l\ slender and not heavily clothed, the head rather small, 

 front legs not very large. The \\ings are not >lender. broadest betbre the 

 apical third, with rounded contours, the well rounded apex above the mid 

 die, the apical margin more oliliipie than the coital as it fall- to the 



